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Class   123INTERNAL-COMBUSTION ENGINES
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[List of Pre Grant Publications for class 123 subclass 1R][List of Patents for class 123 subclass 1R]  1R MISCELLANEOUS
 [List of Pre Grant Publications for class 123 subclass 1A][List of Patents for class 123 subclass 1A]1A Subclass 1A indent level is 1 Fuels, lubricants and additives
[List of Pre Grant Publications for class 123 subclass 2][List of Patents for class 123 subclass 2]2 COMBINED DEVICES
 [List of Pre Grant Publications for class 123 subclass 3][List of Patents for class 123 subclass 3]3 Subclass 3 indent level is 1 Generating plants
[List of Pre Grant Publications for class 123 subclass 200][List of Patents for class 123 subclass 200]200 ROTARY
 [List of Pre Grant Publications for class 123 subclass 201][List of Patents for class 123 subclass 201]201 Subclass 201 indent level is 1 Reversible
 [List of Pre Grant Publications for class 123 subclass 202][List of Patents for class 123 subclass 202]202 Subclass 202 indent level is 1 With means to control degree of compression
 [List of Pre Grant Publications for class 123 subclass 203][List of Patents for class 123 subclass 203]203 Subclass 203 indent level is 1 With combusted gas treatment or handling means
 [List of Pre Grant Publications for class 123 subclass 204][List of Patents for class 123 subclass 204]204 Subclass 204 indent level is 1 With compression volume means in uninterrupted communication with expansion volume means
[List of Pre Grant Publications for class 123 subclass 205][List of Patents for class 123 subclass 205]205 Subclass 205 indent level is 1 With fuel injection means
 [List of Pre Grant Publications for class 123 subclass 206][List of Patents for class 123 subclass 206]206 Subclass 206 indent level is 2 And pump or control means
 [List of Pre Grant Publications for class 123 subclass 207][List of Patents for class 123 subclass 207]207 Subclass 207 indent level is 2 Into intake port
 [List of Pre Grant Publications for class 123 subclass 208][List of Patents for class 123 subclass 208]208 Subclass 208 indent level is 2 Into intake chamber
 [List of Pre Grant Publications for class 123 subclass 209][List of Patents for class 123 subclass 209]209 Subclass 209 indent level is 2 Into prechamber
[List of Pre Grant Publications for class 123 subclass 210][List of Patents for class 123 subclass 210]210 Subclass 210 indent level is 1 With ignition means
 [List of Pre Grant Publications for class 123 subclass 211][List of Patents for class 123 subclass 211]211 Subclass 211 indent level is 2 Plural
[List of Pre Grant Publications for class 123 subclass 212][List of Patents for class 123 subclass 212]212 Subclass 212 indent level is 1 With plural compression volume means
 [List of Pre Grant Publications for class 123 subclass 213][List of Patents for class 123 subclass 213]213 Subclass 213 indent level is 2 In series
[List of Pre Grant Publications for class 123 subclass 214][List of Patents for class 123 subclass 214]214 Subclass 214 indent level is 1 With plural expansion volume means
 [List of Pre Grant Publications for class 123 subclass 215][List of Patents for class 123 subclass 215]215 Subclass 215 indent level is 2 In series
[List of Pre Grant Publications for class 123 subclass 216][List of Patents for class 123 subclass 216]216 Subclass 216 indent level is 1 With charge treatment means
 [List of Pre Grant Publications for class 123 subclass 217][List of Patents for class 123 subclass 217]217 Subclass 217 indent level is 2 Exhaust gas recirculation
 [List of Pre Grant Publications for class 123 subclass 218][List of Patents for class 123 subclass 218]218 Subclass 218 indent level is 2 Rotor shape
 [List of Pre Grant Publications for class 123 subclass 219][List of Patents for class 123 subclass 219]219 Subclass 219 indent level is 2 Stratification
 [List of Pre Grant Publications for class 123 subclass 220][List of Patents for class 123 subclass 220]220 Subclass 220 indent level is 2 Preheating
[List of Pre Grant Publications for class 123 subclass 221][List of Patents for class 123 subclass 221]221 Subclass 221 indent level is 1 With transfer means intermediate single compression volume means and single expansion volume means
 [List of Pre Grant Publications for class 123 subclass 222][List of Patents for class 123 subclass 222]222 Subclass 222 indent level is 2 Isolated charge in movable transfer element
[List of Pre Grant Publications for class 123 subclass 223][List of Patents for class 123 subclass 223]223 Subclass 223 indent level is 2 Reciprocating or oscillating compression volume means
[List of Pre Grant Publications for class 123 subclass 228][List of Patents for class 123 subclass 228]228 Subclass 228 indent level is 2 Compression volume means circumferentially disposed relative to expansion volume means
[List of Pre Grant Publications for class 123 subclass 234][List of Patents for class 123 subclass 234]234 Subclass 234 indent level is 2 Compression volume means axially disposed relative to expansion volume means
[List of Pre Grant Publications for class 123 subclass 239][List of Patents for class 123 subclass 239]239 Subclass 239 indent level is 2 Compression volume means radially disposed relative to expansion volume means
[List of Pre Grant Publications for class 123 subclass 241][List of Patents for class 123 subclass 241]241 Subclass 241 indent level is 1 With compression, combustion, and expansion in a single variable volume
 [List of Pre Grant Publications for class 123 subclass 242][List of Patents for class 123 subclass 242]242 Subclass 242 indent level is 2 Planetating rotor
 [List of Pre Grant Publications for class 123 subclass 243][List of Patents for class 123 subclass 243]243 Subclass 243 indent level is 2 Vane
 [List of Pre Grant Publications for class 123 subclass 244][List of Patents for class 123 subclass 244]244 Subclass 244 indent level is 2 Abutment
[List of Pre Grant Publications for class 123 subclass 245][List of Patents for class 123 subclass 245]245 Subclass 245 indent level is 2 Alternately approaching and receding elements
[List of Pre Grant Publications for class 123 subclass 247][List of Patents for class 123 subclass 247]247 Subclass 247 indent level is 1 Only combustion and expansion of charge in engine
 [List of Pre Grant Publications for class 123 subclass 248][List of Patents for class 123 subclass 248]248 Subclass 248 indent level is 2 Abutment
 [List of Pre Grant Publications for class 123 subclass 249][List of Patents for class 123 subclass 249]249 Subclass 249 indent level is 2 Interengaging rotors
[List of Pre Grant Publications for class 123 subclass 18R][List of Patents for class 123 subclass 18R]  18R OSCILLATING PISTON
 [List of Pre Grant Publications for class 123 subclass 18A][List of Patents for class 123 subclass 18A]18A Subclass 18A indent level is 1 Toroidal cylinder
 [List of Pre Grant Publications for class 123 subclass 19][List of Patents for class 123 subclass 19]19 LIQUID PISTON
 [List of Pre Grant Publications for class 123 subclass 21][List of Patents for class 123 subclass 21]21 CONVERTIBLE CYCLE
 [List of Pre Grant Publications for class 123 subclass 22][List of Patents for class 123 subclass 22]22 INTERNAL COMBUSTION AND AIR
 [List of Pre Grant Publications for class 123 subclass 23][List of Patents for class 123 subclass 23]23 SOLID FUEL
[List of Pre Grant Publications for class 123 subclass 24R][List of Patents for class 123 subclass 24R]  24R GUNPOWDER
 [List of Pre Grant Publications for class 123 subclass 24A][List of Patents for class 123 subclass 24A]24A Subclass 24A indent level is 1 Single shot gun powder motors
[List of Pre Grant Publications for class 123 subclass 25R][List of Patents for class 123 subclass 25R]  25R WATER AND HYDROCARBON
 [List of Pre Grant Publications for class 123 subclass 25A][List of Patents for class 123 subclass 25A]25A Subclass 25A indent level is 1 Water in charge
 [List of Pre Grant Publications for class 123 subclass 25B][List of Patents for class 123 subclass 25B]25B Subclass 25B indent level is 1 Water plus heat into charge
 [List of Pre Grant Publications for class 123 subclass 25C][List of Patents for class 123 subclass 25C]25C Subclass 25C indent level is 1 Water into cylinder
 [List of Pre Grant Publications for class 123 subclass 25D][List of Patents for class 123 subclass 25D]25D Subclass 25D indent level is 1 Water plus heat into charge
 [List of Pre Grant Publications for class 123 subclass 25E][List of Patents for class 123 subclass 25E]25E Subclass 25E indent level is 1 Water introduced by mixing with other materials
 [List of Pre Grant Publications for class 123 subclass 25F][List of Patents for class 123 subclass 25F]25F Subclass 25F indent level is 1 Water plus heat by mixing with other materials
 [List of Pre Grant Publications for class 123 subclass 25G][List of Patents for class 123 subclass 25G]25G Subclass 25G indent level is 1 Washers and cleaners
 [List of Pre Grant Publications for class 123 subclass 25H][List of Patents for class 123 subclass 25H]25H Subclass 25H indent level is 1 Washers and cleaners with heat
 [List of Pre Grant Publications for class 123 subclass 25J][List of Patents for class 123 subclass 25J]25J Subclass 25J indent level is 1 Automatic water control
 [List of Pre Grant Publications for class 123 subclass 25K][List of Patents for class 123 subclass 25K]25K Subclass 25K indent level is 1 Automatic water control; thermostatic
 [List of Pre Grant Publications for class 123 subclass 25L][List of Patents for class 123 subclass 25L]25L Subclass 25L indent level is 1 Automatic water control; suction
 [List of Pre Grant Publications for class 123 subclass 25M][List of Patents for class 123 subclass 25M]25M Subclass 25M indent level is 1 Automatic water control; speed
 [List of Pre Grant Publications for class 123 subclass 25N][List of Patents for class 123 subclass 25N]25N Subclass 25N indent level is 1 Automatic water control interconnected with throttle
 [List of Pre Grant Publications for class 123 subclass 25P][List of Patents for class 123 subclass 25P]25P Subclass 25P indent level is 1 Steam injection
 [List of Pre Grant Publications for class 123 subclass 25Q][List of Patents for class 123 subclass 25Q]25Q Subclass 25Q indent level is 1 Cooling regulation
 [List of Pre Grant Publications for class 123 subclass 26][List of Patents for class 123 subclass 26]26 ADDITIONAL AIR SUPPLY
[List of Pre Grant Publications for class 123 subclass 250][List of Patents for class 123 subclass 250]250 ENGINE MEANS HAVING INTERNAL VAPORIZING IN PRECHAMBER WITH ALL COMBUSTION IN MAIN CHAMBER
 [List of Pre Grant Publications for class 123 subclass 251][List of Patents for class 123 subclass 251]251 Subclass 251 indent level is 1 Whirling in prechamber
 [List of Pre Grant Publications for class 123 subclass 252][List of Patents for class 123 subclass 252]252 Subclass 252 indent level is 1 Vaporizing by a hot surface of prechamber
[List of Pre Grant Publications for class 123 subclass 253][List of Patents for class 123 subclass 253]253 PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES
 [List of Pre Grant Publications for class 123 subclass 254][List of Patents for class 123 subclass 254]254 Subclass 254 indent level is 1 Chamber temperature control means
 [List of Pre Grant Publications for class 123 subclass 255][List of Patents for class 123 subclass 255]255 Subclass 255 indent level is 1 Vaporizing in precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 256][List of Patents for class 123 subclass 256]256 Subclass 256 indent level is 1 Plural precombustion chambers
 [List of Pre Grant Publications for class 123 subclass 257][List of Patents for class 123 subclass 257]257 Subclass 257 indent level is 1 Two-cycle
 [List of Pre Grant Publications for class 123 subclass 258][List of Patents for class 123 subclass 258]258 Subclass 258 indent level is 1 Having timed valves to precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 259][List of Patents for class 123 subclass 259]259 Subclass 259 indent level is 1 Having volumetric relation between precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 260][List of Patents for class 123 subclass 260]260 Subclass 260 indent level is 1 With ignition means particularly positioned relative to precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 261][List of Patents for class 123 subclass 261]261 Subclass 261 indent level is 1 With injection means particularly positioned relative to precombustion and main combustion chambers
[List of Pre Grant Publications for class 123 subclass 262][List of Patents for class 123 subclass 262]262 Subclass 262 indent level is 1 Having fluid whirling means
 [List of Pre Grant Publications for class 123 subclass 263][List of Patents for class 123 subclass 263]263 Subclass 263 indent level is 2 Whirling in precombustion chamber only
 [List of Pre Grant Publications for class 123 subclass 264][List of Patents for class 123 subclass 264]264 Subclass 264 indent level is 1 Precombustion chamber is carried by a valve
 [List of Pre Grant Publications for class 123 subclass 265][List of Patents for class 123 subclass 265]265 Subclass 265 indent level is 1 Precombustion and main chambers form an "I" head
[List of Pre Grant Publications for class 123 subclass 266][List of Patents for class 123 subclass 266]266 Subclass 266 indent level is 1 Precombustion chamber assembly inserted in spark plug hole
 [List of Pre Grant Publications for class 123 subclass 267][List of Patents for class 123 subclass 267]267 Subclass 267 indent level is 2 Separate fuel or combustible mixture added to precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 268][List of Patents for class 123 subclass 268]268 Subclass 268 indent level is 1 Valveless precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 269][List of Patents for class 123 subclass 269]269 Subclass 269 indent level is 1 Piston shape complements precombustion chamber discharge
[List of Pre Grant Publications for class 123 subclass 270][List of Patents for class 123 subclass 270]270 Subclass 270 indent level is 1 Precombustion chamber liner or coating
 [List of Pre Grant Publications for class 123 subclass 271][List of Patents for class 123 subclass 271]271 Subclass 271 indent level is 2 With liner mounting means
 [List of Pre Grant Publications for class 123 subclass 272][List of Patents for class 123 subclass 272]272 Subclass 272 indent level is 2 Including combustion catalyst liner or coating means
 [List of Pre Grant Publications for class 123 subclass 273][List of Patents for class 123 subclass 273]273 Subclass 273 indent level is 1 Precombustion chamber mounting means
[List of Pre Grant Publications for class 123 subclass 274][List of Patents for class 123 subclass 274]274 Subclass 274 indent level is 1 Having combustible mixture forming means
[List of Pre Grant Publications for class 123 subclass 275][List of Patents for class 123 subclass 275]275 Subclass 275 indent level is 2 By fuel injection into precombustion or main combustion chamber
 [List of Pre Grant Publications for class 123 subclass 279][List of Patents for class 123 subclass 279]279 Subclass 279 indent level is 1 Piston carried precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 280][List of Patents for class 123 subclass 280]280 Subclass 280 indent level is 1 Atomizer, deflector, or shield in precombustion chamber
[List of Pre Grant Publications for class 123 subclass 281][List of Patents for class 123 subclass 281]281 Subclass 281 indent level is 1 Precombustion chamber shape is a figure of revolution
 [List of Pre Grant Publications for class 123 subclass 282][List of Patents for class 123 subclass 282]282 Subclass 282 indent level is 2 Figure of revolution is multishaped to form a precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 283][List of Patents for class 123 subclass 283]283 Subclass 283 indent level is 2 Cylindrical
 [List of Pre Grant Publications for class 123 subclass 284][List of Patents for class 123 subclass 284]284 Subclass 284 indent level is 2 Spherical
 [List of Pre Grant Publications for class 123 subclass 285][List of Patents for class 123 subclass 285]285 Subclass 285 indent level is 1 Precombustion chamber having a specific shape
[List of Pre Grant Publications for class 123 subclass 286][List of Patents for class 123 subclass 286]286 Subclass 286 indent level is 1 Having specific connecting passage means between precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 287][List of Patents for class 123 subclass 287]287 Subclass 287 indent level is 2 With ignition means in connecting passage
 [List of Pre Grant Publications for class 123 subclass 288][List of Patents for class 123 subclass 288]288 Subclass 288 indent level is 2 Having fuel, a combustible mixture, or air added in the connecting passage
[List of Pre Grant Publications for class 123 subclass 289][List of Patents for class 123 subclass 289]289 Subclass 289 indent level is 2 Fluid flow through passage controlled by working piston
 [List of Pre Grant Publications for class 123 subclass 292][List of Patents for class 123 subclass 292]292 Subclass 292 indent level is 2 With valve means or variable orifice means in the passage
 [List of Pre Grant Publications for class 123 subclass 293][List of Patents for class 123 subclass 293]293 Subclass 293 indent level is 2 Having multiple passages
[List of Pre Grant Publications for class 123 subclass 294][List of Patents for class 123 subclass 294]294 COMBUSTION CHAMBER MEANS HAVING FUEL INJECTION ONLY
 [List of Pre Grant Publications for class 123 subclass 295][List of Patents for class 123 subclass 295]295 Subclass 295 indent level is 1 Combustible mixture stratification means
 [List of Pre Grant Publications for class 123 subclass 296][List of Patents for class 123 subclass 296]296 Subclass 296 indent level is 1 Injector is an integral part of engine valve
 [List of Pre Grant Publications for class 123 subclass 297][List of Patents for class 123 subclass 297]297 Subclass 297 indent level is 1 Combination igniting means and injector
 [List of Pre Grant Publications for class 123 subclass 298][List of Patents for class 123 subclass 298]298 Subclass 298 indent level is 1 Injection of fuel onto igniter, deflector, heater, or atomizer
[List of Pre Grant Publications for class 123 subclass 299][List of Patents for class 123 subclass 299]299 Subclass 299 indent level is 1 Using multiple injectors or injections
 [List of Pre Grant Publications for class 123 subclass 300][List of Patents for class 123 subclass 300]300 Subclass 300 indent level is 2 Alternating multiple injectors (e.g., series injection)
 [List of Pre Grant Publications for class 123 subclass 301][List of Patents for class 123 subclass 301]301 Subclass 301 indent level is 1 Injected fuel spraying into whirling fluid
[List of Pre Grant Publications for class 123 subclass 302][List of Patents for class 123 subclass 302]302 Subclass 302 indent level is 1 Air entering combustion chamber through plural inlets
 [List of Pre Grant Publications for class 123 subclass 303][List of Patents for class 123 subclass 303]303 Subclass 303 indent level is 2 Having inlet uncovered by working piston
 [List of Pre Grant Publications for class 123 subclass 304][List of Patents for class 123 subclass 304]304 Subclass 304 indent level is 1 Injecting diverse fuels or different states of same fuel
 [List of Pre Grant Publications for class 123 subclass 305][List of Patents for class 123 subclass 305]305 Subclass 305 indent level is 1 Having a particular relationship between injection and ignition characteristics (e.g., nozzle location, spray pattern, timing relative to igniter location, timing)
[List of Pre Grant Publications for class 123 subclass 27R][List of Patents for class 123 subclass 27R]  27R BURNING BY HIGHLY COMPRESSED AIR
 [List of Pre Grant Publications for class 123 subclass 27GE][List of Patents for class 123 subclass 27GE]27GE Subclass 27GE indent level is 1 Gas engines (diesel type) convertible from liquid to gas or operable with liquid and gas
 [List of Pre Grant Publications for class 123 subclass 27A][List of Patents for class 123 subclass 27A]27A Subclass 27A indent level is 1 Oil engine air preheated
     OIL ENGINES
                 Subclass indent level is 1 Pump supply to air inlet
 [List of Pre Grant Publications for class 123 subclass 37][List of Patents for class 123 subclass 37]37 MULTIPLE EXPLOSION
 [List of Pre Grant Publications for class 123 subclass 38][List of Patents for class 123 subclass 38]38 ATMOSPHERIC
 [List of Pre Grant Publications for class 123 subclass 39][List of Patents for class 123 subclass 39]39 NONCOMPRESSION
[List of Pre Grant Publications for class 123 subclass 41R][List of Patents for class 123 subclass 41R]  41R REVERSIBLE
 [List of Pre Grant Publications for class 123 subclass 41E][List of Patents for class 123 subclass 41E]41E Subclass 41E indent level is 1 Electrical
[List of Pre Grant Publications for class 123 subclass 41.01][List of Patents for class 123 subclass 41.01]41.01 COOLING
[List of Pre Grant Publications for class 123 subclass 41.02][List of Patents for class 123 subclass 41.02]41.02 Subclass 41.02 indent level is 1 Automatic coolant flow control
 [List of Pre Grant Publications for class 123 subclass 41.03][List of Patents for class 123 subclass 41.03]41.03 Subclass 41.03 indent level is 2 Float control
[List of Pre Grant Publications for class 123 subclass 41.04][List of Patents for class 123 subclass 41.04]41.04 Subclass 41.04 indent level is 2 Shutters, air valves, dampers or adjustable cowls
[List of Pre Grant Publications for class 123 subclass 41.08][List of Patents for class 123 subclass 41.08]41.08 Subclass 41.08 indent level is 2 Valves for fluid coolant
[List of Pre Grant Publications for class 123 subclass 41.11][List of Patents for class 123 subclass 41.11]41.11 Subclass 41.11 indent level is 2 Air impeller
 [List of Pre Grant Publications for class 123 subclass 41.13][List of Patents for class 123 subclass 41.13]41.13 Subclass 41.13 indent level is 1 Interrelated coolant flow and throttle control
 [List of Pre Grant Publications for class 123 subclass 41.14][List of Patents for class 123 subclass 41.14]41.14 Subclass 41.14 indent level is 1 System drained and/or heat-storing
 [List of Pre Grant Publications for class 123 subclass 41.15][List of Patents for class 123 subclass 41.15]41.15 Subclass 41.15 indent level is 1 Indicators and safety devices
 [List of Pre Grant Publications for class 123 subclass 41.16][List of Patents for class 123 subclass 41.16]41.16 Subclass 41.16 indent level is 1 Coolant sealed in cylinder valve or piston
 [List of Pre Grant Publications for class 123 subclass 41.17][List of Patents for class 123 subclass 41.17]41.17 Subclass 41.17 indent level is 1 Coolant released into cylinder or valve passages
 [List of Pre Grant Publications for class 123 subclass 41.18][List of Patents for class 123 subclass 41.18]41.18 Subclass 41.18 indent level is 1 Convertible
 [List of Pre Grant Publications for class 123 subclass 41.19][List of Patents for class 123 subclass 41.19]41.19 Subclass 41.19 indent level is 1 Refrigerating cycle
[List of Pre Grant Publications for class 123 subclass 41.2][List of Patents for class 123 subclass 41.2]41.2 Subclass 41.2 indent level is 1 With vapor generation and/or condensing
[List of Pre Grant Publications for class 123 subclass 41.21][List of Patents for class 123 subclass 41.21]41.21 Subclass 41.21 indent level is 2 Coolant circulation with condensing
 [List of Pre Grant Publications for class 123 subclass 41.28][List of Patents for class 123 subclass 41.28]41.28 Subclass 41.28 indent level is 1 Multiple cylinders with equalized cooling
 [List of Pre Grant Publications for class 123 subclass 41.29][List of Patents for class 123 subclass 41.29]41.29 Subclass 41.29 indent level is 1 Parallel flow
 [List of Pre Grant Publications for class 123 subclass 41.3][List of Patents for class 123 subclass 41.3]41.3 Subclass 41.3 indent level is 1 Mixed air and liquid
[List of Pre Grant Publications for class 123 subclass 41.31][List of Patents for class 123 subclass 41.31]41.31 Subclass 41.31 indent level is 1 With cooling of additional parts or materials
 [List of Pre Grant Publications for class 123 subclass 41.32][List of Patents for class 123 subclass 41.32]41.32 Subclass 41.32 indent level is 2 With spark plug heat exchange
 [List of Pre Grant Publications for class 123 subclass 41.33][List of Patents for class 123 subclass 41.33]41.33 Subclass 41.33 indent level is 2 With lubricant heat exchange
[List of Pre Grant Publications for class 123 subclass 41.34][List of Patents for class 123 subclass 41.34]41.34 Subclass 41.34 indent level is 1 Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder
[List of Pre Grant Publications for class 123 subclass 41.35][List of Patents for class 123 subclass 41.35]41.35 Subclass 41.35 indent level is 2 Piston
 [List of Pre Grant Publications for class 123 subclass 41.4][List of Patents for class 123 subclass 41.4]41.4 Subclass 41.4 indent level is 2 Rotary valves
 [List of Pre Grant Publications for class 123 subclass 41.41][List of Patents for class 123 subclass 41.41]41.41 Subclass 41.41 indent level is 2 Poppet-type valves
 [List of Pre Grant Publications for class 123 subclass 41.42][List of Patents for class 123 subclass 41.42]41.42 Subclass 41.42 indent level is 1 Liquid coolants other than water and water treatment
 [List of Pre Grant Publications for class 123 subclass 41.43][List of Patents for class 123 subclass 41.43]41.43 Subclass 41.43 indent level is 1 Movably mounted tank or radiator
[List of Pre Grant Publications for class 123 subclass 41.44][List of Patents for class 123 subclass 41.44]41.44 Subclass 41.44 indent level is 1 With liquid coolant circulating means
 [List of Pre Grant Publications for class 123 subclass 41.45][List of Patents for class 123 subclass 41.45]41.45 Subclass 41.45 indent level is 2 Jet pumps
 [List of Pre Grant Publications for class 123 subclass 41.46][List of Patents for class 123 subclass 41.46]41.46 Subclass 41.46 indent level is 2 Common drive for pump and fan
 [List of Pre Grant Publications for class 123 subclass 41.47][List of Patents for class 123 subclass 41.47]41.47 Subclass 41.47 indent level is 2 Engine shaft driven
[List of Pre Grant Publications for class 123 subclass 41.48][List of Patents for class 123 subclass 41.48]41.48 Subclass 41.48 indent level is 1 Devices for cooling liquid by air flow
 [List of Pre Grant Publications for class 123 subclass 41.49][List of Patents for class 123 subclass 41.49]41.49 Subclass 41.49 indent level is 2 Fan type
 [List of Pre Grant Publications for class 123 subclass 41.5][List of Patents for class 123 subclass 41.5]41.5 Subclass 41.5 indent level is 1 Yielding or resilient walls
 [List of Pre Grant Publications for class 123 subclass 41.51][List of Patents for class 123 subclass 41.51]41.51 Subclass 41.51 indent level is 1 Plural radiators and/or tanks in series
[List of Pre Grant Publications for class 123 subclass 41.52][List of Patents for class 123 subclass 41.52]41.52 Subclass 41.52 indent level is 1 Engine or cylinder-mounted heat dissipators
 [List of Pre Grant Publications for class 123 subclass 41.53][List of Patents for class 123 subclass 41.53]41.53 Subclass 41.53 indent level is 2 Hopper type
 [List of Pre Grant Publications for class 123 subclass 41.54][List of Patents for class 123 subclass 41.54]41.54 Subclass 41.54 indent level is 1 With vent
 [List of Pre Grant Publications for class 123 subclass 41.55][List of Patents for class 123 subclass 41.55]41.55 Subclass 41.55 indent level is 1 Combined
[List of Pre Grant Publications for class 123 subclass 41.56][List of Patents for class 123 subclass 41.56]41.56 Subclass 41.56 indent level is 1 Air-cooled
 [List of Pre Grant Publications for class 123 subclass 41.57][List of Patents for class 123 subclass 41.57]41.57 Subclass 41.57 indent level is 2 With liquid cooling
[List of Pre Grant Publications for class 123 subclass 41.58][List of Patents for class 123 subclass 41.58]41.58 Subclass 41.58 indent level is 2 Flow-regulating means
[List of Pre Grant Publications for class 123 subclass 41.6][List of Patents for class 123 subclass 41.6]41.6 Subclass 41.6 indent level is 2 Steam dividing vanes, baffles, conduits, or the like for multiple cylinders
[List of Pre Grant Publications for class 123 subclass 41.63][List of Patents for class 123 subclass 41.63]41.63 Subclass 41.63 indent level is 2 With impelling means
[List of Pre Grant Publications for class 123 subclass 41.67][List of Patents for class 123 subclass 41.67]41.67 Subclass 41.67 indent level is 2 Jacketed cylinder
 [List of Pre Grant Publications for class 123 subclass 41.69][List of Patents for class 123 subclass 41.69]41.69 Subclass 41.69 indent level is 2 Finned cylinder and/or head
 [List of Pre Grant Publications for class 123 subclass 41.7][List of Patents for class 123 subclass 41.7]41.7 Subclass 41.7 indent level is 2 Engine encasing air duct; e.g., cowling
 [List of Pre Grant Publications for class 123 subclass 41.71][List of Patents for class 123 subclass 41.71]41.71 Subclass 41.71 indent level is 1 Plural materials
[List of Pre Grant Publications for class 123 subclass 41.72][List of Patents for class 123 subclass 41.72]41.72 Subclass 41.72 indent level is 1 With jacketed head and/or cylinder
 [List of Pre Grant Publications for class 123 subclass 41.73][List of Patents for class 123 subclass 41.73]41.73 Subclass 41.73 indent level is 2 Jet or spray within jacket
 [List of Pre Grant Publications for class 123 subclass 41.74][List of Patents for class 123 subclass 41.74]41.74 Subclass 41.74 indent level is 2 Multiple cylinder
 [List of Pre Grant Publications for class 123 subclass 41.75][List of Patents for class 123 subclass 41.75]41.75 Subclass 41.75 indent level is 2 Reentrant head
[List of Pre Grant Publications for class 123 subclass 41.76][List of Patents for class 123 subclass 41.76]41.76 Subclass 41.76 indent level is 2 With cooled valve seats or guides
[List of Pre Grant Publications for class 123 subclass 41.79][List of Patents for class 123 subclass 41.79]41.79 Subclass 41.79 indent level is 2 With passages, baffles, etc.
 [List of Pre Grant Publications for class 123 subclass 41.81][List of Patents for class 123 subclass 41.81]41.81 Subclass 41.81 indent level is 2 Cylinder jacket supported solely by cylinder
[List of Pre Grant Publications for class 123 subclass 41.82R][List of Patents for class 123 subclass 41.82R]  41.82R Subclass 41.82R indent level is 2 With head-cooling arrangements
[List of Pre Grant Publications for class 123 subclass 41.83][List of Patents for class 123 subclass 41.83]41.83 Subclass 41.83 indent level is 2 Cylinder detachable
 [List of Pre Grant Publications for class 123 subclass 41.85][List of Patents for class 123 subclass 41.85]41.85 Subclass 41.85 indent level is 1 Valve seats or guides
 [List of Pre Grant Publications for class 123 subclass 41.86][List of Patents for class 123 subclass 41.86]41.86 CRANKCASE VENTILATION
 [List of Pre Grant Publications for class 123 subclass 42][List of Patents for class 123 subclass 42]42 OSCILLATING CYLINDER
[List of Pre Grant Publications for class 123 subclass 43R][List of Patents for class 123 subclass 43R]  43R ROTATING CYLINDER
[List of Pre Grant Publications for class 123 subclass 44R][List of Patents for class 123 subclass 44R]  44R Subclass 44R indent level is 1 Radial
 [List of Pre Grant Publications for class 123 subclass 44A][List of Patents for class 123 subclass 44A]44A Subclass 44A indent level is 2 Wheel
 [List of Pre Grant Publications for class 123 subclass 44B][List of Patents for class 123 subclass 44B]44B Subclass 44B indent level is 2 Combustion chamber is center of star
 [List of Pre Grant Publications for class 123 subclass 44C][List of Patents for class 123 subclass 44C]44C Subclass 44C indent level is 2 Two-cycle
 [List of Pre Grant Publications for class 123 subclass 44D][List of Patents for class 123 subclass 44D]44D Subclass 44D indent level is 2 Valve casing-cylinders have no valves but have ports which register with ports in casing
 [List of Pre Grant Publications for class 123 subclass 44E][List of Patents for class 123 subclass 44E]44E Subclass 44E indent level is 2 Cam transmission
[List of Pre Grant Publications for class 123 subclass 43A][List of Patents for class 123 subclass 43A]43A Subclass 43A indent level is 1 Parallel to shaft
 [List of Pre Grant Publications for class 123 subclass 43AA][List of Patents for class 123 subclass 43AA]43AA Subclass 43AA indent level is 2 Parallel to shaft cam track
 [List of Pre Grant Publications for class 123 subclass 43B][List of Patents for class 123 subclass 43B]43B Subclass 43B indent level is 1 Toroidal cylinders
 [List of Pre Grant Publications for class 123 subclass 43C][List of Patents for class 123 subclass 43C]43C Subclass 43C indent level is 1 Cam transmission
[List of Pre Grant Publications for class 123 subclass 45R][List of Patents for class 123 subclass 45R]  45R ROTARY RECIPROCATING PISTON
 [List of Pre Grant Publications for class 123 subclass 45A][List of Patents for class 123 subclass 45A]45A Subclass 45A indent level is 1 Piston and crankshaft coaxial
[List of Pre Grant Publications for class 123 subclass 46R][List of Patents for class 123 subclass 46R]  46R FREE PISTON
 [List of Pre Grant Publications for class 123 subclass 46A][List of Patents for class 123 subclass 46A]46A Subclass 46A indent level is 1 Two chambers; one piston
 [List of Pre Grant Publications for class 123 subclass 46B][List of Patents for class 123 subclass 46B]46B Subclass 46B indent level is 1 Phasing means between two or more units
 [List of Pre Grant Publications for class 123 subclass 46SC][List of Patents for class 123 subclass 46SC]46SC Subclass 46SC indent level is 1 Single chamber; one piston
 [List of Pre Grant Publications for class 123 subclass 46E][List of Patents for class 123 subclass 46E]46E Subclass 46E indent level is 1 Electric generating means
 [List of Pre Grant Publications for class 123 subclass 46H][List of Patents for class 123 subclass 46H]46H Subclass 46H indent level is 1 Hammer
[List of Pre Grant Publications for class 123 subclass 47R][List of Patents for class 123 subclass 47R]  47R VALVED PISTON
 [List of Pre Grant Publications for class 123 subclass 47A][List of Patents for class 123 subclass 47A]47A Subclass 47A indent level is 1 Charge passes from crankcase through valve in piston
 [List of Pre Grant Publications for class 123 subclass 47AA][List of Patents for class 123 subclass 47AA]47AA Subclass 47AA indent level is 1 Lost motion connection actuates valve
 [List of Pre Grant Publications for class 123 subclass 47AB][List of Patents for class 123 subclass 47AB]47AB Subclass 47AB indent level is 1 Inlet and exhaust valve in piston
[List of Pre Grant Publications for class 123 subclass 48R][List of Patents for class 123 subclass 48R]  48R ADJUSTABLE COMBUSTION CHAMBER
 [List of Pre Grant Publications for class 123 subclass 48A][List of Patents for class 123 subclass 48A]48A Subclass 48A indent level is 1 Piston in head adjusted manually or mechanically
 [List of Pre Grant Publications for class 123 subclass 48AA][List of Patents for class 123 subclass 48AA]48AA Subclass 48AA indent level is 1 Piston in head adjusted
 [List of Pre Grant Publications for class 123 subclass 48B][List of Patents for class 123 subclass 48B]48B Subclass 48B indent level is 1 Piston varied by means in crankshaft, connecting rod or piston
 [List of Pre Grant Publications for class 123 subclass 48C][List of Patents for class 123 subclass 48C]48C Subclass 48C indent level is 1 Cylinder or sleeve-moved
 [List of Pre Grant Publications for class 123 subclass 48D][List of Patents for class 123 subclass 48D]48D Subclass 48D indent level is 1 Auxiliary chamber
[List of Pre Grant Publications for class 123 subclass 50R][List of Patents for class 123 subclass 50R]  50R RECIPROCATING CYLINDER
 [List of Pre Grant Publications for class 123 subclass 50A][List of Patents for class 123 subclass 50A]50A Subclass 50A indent level is 1 Four-cycle
 [List of Pre Grant Publications for class 123 subclass 50B][List of Patents for class 123 subclass 50B]50B Subclass 50B indent level is 1 Two-cycle
[List of Pre Grant Publications for class 123 subclass 51R][List of Patents for class 123 subclass 51R]  51R MULTIPLE PISTON, COMMON NONRESTRICTIVE COMBUSTION CHAMBER
[List of Pre Grant Publications for class 123 subclass 51A][List of Patents for class 123 subclass 51A]51A Subclass 51A indent level is 1 Four-cycle
 [List of Pre Grant Publications for class 123 subclass 51AA][List of Patents for class 123 subclass 51AA]51AA Subclass 51AA indent level is 2 Four-cycle separate crankshaft for piston
 [List of Pre Grant Publications for class 123 subclass 51AC][List of Patents for class 123 subclass 51AC]51AC Subclass 51AC indent level is 2 Two or more combustion chambers between the piston
[List of Pre Grant Publications for class 123 subclass 51B][List of Patents for class 123 subclass 51B]51B Subclass 51B indent level is 1 Two-cycle
 [List of Pre Grant Publications for class 123 subclass 51BA][List of Patents for class 123 subclass 51BA]51BA Subclass 51BA indent level is 2 Two-cycle separate crankshaft for piston
 [List of Pre Grant Publications for class 123 subclass 51BB][List of Patents for class 123 subclass 51BB]51BB Subclass 51BB indent level is 2 Piston offset from crankshaft
 [List of Pre Grant Publications for class 123 subclass 51BC][List of Patents for class 123 subclass 51BC]51BC Subclass 51BC indent level is 2 Plural combustion chamber and plural piston
 [List of Pre Grant Publications for class 123 subclass 51BD][List of Patents for class 123 subclass 51BD]51BD Subclass 51BD indent level is 2 Inlet or exhaust ports in two or more planes
[List of Pre Grant Publications for class 123 subclass 52.1][List of Patents for class 123 subclass 52.1]52.1 MULTIPLE CYLINDER
[List of Pre Grant Publications for class 123 subclass 52.2][List of Patents for class 123 subclass 52.2]52.2 Subclass 52.2 indent level is 1 Simultaneous compression, distinct pistons, restricted communication to a single combustion chamber
[List of Pre Grant Publications for class 123 subclass 52.3][List of Patents for class 123 subclass 52.3]52.3 Subclass 52.3 indent level is 2 Four-stroke cycle
[List of Pre Grant Publications for class 123 subclass 52.5][List of Patents for class 123 subclass 52.5]52.5 Subclass 52.5 indent level is 2 Two-stroke cycle
[List of Pre Grant Publications for class 123 subclass 53.1][List of Patents for class 123 subclass 53.1]53.1 Subclass 53.1 indent level is 1 Cylinder offset from crankshaft axis
 [List of Pre Grant Publications for class 123 subclass 53.2][List of Patents for class 123 subclass 53.2]53.2 Subclass 53.2 indent level is 2 Multiple crankshafts
[List of Pre Grant Publications for class 123 subclass 53.3][List of Patents for class 123 subclass 53.3]53.3 Subclass 53.3 indent level is 2 Cylinders opposite
 [List of Pre Grant Publications for class 123 subclass 53.5][List of Patents for class 123 subclass 53.5]53.5 Subclass 53.5 indent level is 2 Crankshaft between parallel cylinders
 [List of Pre Grant Publications for class 123 subclass 53.6][List of Patents for class 123 subclass 53.6]53.6 Subclass 53.6 indent level is 1 Cylinders having opposing heads
[List of Pre Grant Publications for class 123 subclass 54.1][List of Patents for class 123 subclass 54.1]54.1 Subclass 54.1 indent level is 1 Cylinders radiating
[List of Pre Grant Publications for class 123 subclass 54.2][List of Patents for class 123 subclass 54.2]54.2 Subclass 54.2 indent level is 2 Star
[List of Pre Grant Publications for class 123 subclass 54.4][List of Patents for class 123 subclass 54.4]54.4 Subclass 54.4 indent level is 2 "V" type
 [List of Pre Grant Publications for class 123 subclass 55.1][List of Patents for class 123 subclass 55.1]55.1 Subclass 55.1 indent level is 2 Semi-radial
[List of Pre Grant Publications for class 123 subclass 55.2][List of Patents for class 123 subclass 55.2]55.2 Subclass 55.2 indent level is 2 Cylinders opposite
[List of Pre Grant Publications for class 123 subclass 56.1][List of Patents for class 123 subclass 56.1]56.1 Subclass 56.1 indent level is 1 Having rotary output shaft parallel to cylinders
[List of Pre Grant Publications for class 123 subclass 56.2][List of Patents for class 123 subclass 56.2]56.2 Subclass 56.2 indent level is 2 Cam on rotary output shaft
 [List of Pre Grant Publications for class 123 subclass 57.1][List of Patents for class 123 subclass 57.1]57.1 Subclass 57.1 indent level is 2 Shaft rotates through piston
[List of Pre Grant Publications for class 123 subclass 58.1][List of Patents for class 123 subclass 58.1]58.1 Subclass 58.1 indent level is 1 Cylinders in-line
[List of Pre Grant Publications for class 123 subclass 58.2][List of Patents for class 123 subclass 58.2]58.2 Subclass 58.2 indent level is 2 Locked pistons
[List of Pre Grant Publications for class 123 subclass 58.4][List of Patents for class 123 subclass 58.4]58.4 Subclass 58.4 indent level is 2 Lengthwise charging
 [List of Pre Grant Publications for class 123 subclass 58.6][List of Patents for class 123 subclass 58.6]58.6 Subclass 58.6 indent level is 2 Step piston
 [List of Pre Grant Publications for class 123 subclass 58.7][List of Patents for class 123 subclass 58.7]58.7 Subclass 58.7 indent level is 2 Cylinder supercharged by pressure pulse of released exhaust gases
 [List of Pre Grant Publications for class 123 subclass 58.8][List of Patents for class 123 subclass 58.8]58.8 Subclass 58.8 indent level is 2 Exhaust to next cylinder ready to fire
 [List of Pre Grant Publications for class 123 subclass 58.9][List of Patents for class 123 subclass 58.9]58.9 Subclass 58.9 indent level is 2 Oscillating or reciprocating, nonpoppet valve
[List of Pre Grant Publications for class 123 subclass 59.1][List of Patents for class 123 subclass 59.1]59.1 Subclass 59.1 indent level is 2 Rotary valve
 [List of Pre Grant Publications for class 123 subclass 59.5][List of Patents for class 123 subclass 59.5]59.5 Subclass 59.5 indent level is 2 Plural carburetors
 [List of Pre Grant Publications for class 123 subclass 59.6][List of Patents for class 123 subclass 59.6]59.6 Subclass 59.6 indent level is 2 Multiple crankshafts
 [List of Pre Grant Publications for class 123 subclass 59.7][List of Patents for class 123 subclass 59.7]59.7 Subclass 59.7 indent level is 2 Two-stroke cycle
 [List of Pre Grant Publications for class 123 subclass 60.1][List of Patents for class 123 subclass 60.1]60.1 Subclass 60.1 indent level is 1 Locked annular piston
     DOUBLE-ACTING
[List of Pre Grant Publications for class 123 subclass 61R][List of Patents for class 123 subclass 61R]  61R Subclass 61R indent level is 1 Two-cycle
 [List of Pre Grant Publications for class 123 subclass 62][List of Patents for class 123 subclass 62]62 Subclass 62 indent level is 2 Combined pump and motor cylinder
 [List of Pre Grant Publications for class 123 subclass 61V][List of Patents for class 123 subclass 61V]61V Subclass 61V indent level is 2 Lengthwise scavenging of cylinders from cylinder head to piston
 [List of Pre Grant Publications for class 123 subclass 63][List of Patents for class 123 subclass 63]63 Subclass 63 indent level is 1 Four-cycle
 [List of Pre Grant Publications for class 123 subclass 64][List of Patents for class 123 subclass 64]64 SIX-CYCLE
[List of Pre Grant Publications for class 123 subclass 65R][List of Patents for class 123 subclass 65R]  65R TWO-CYCLE
 [List of Pre Grant Publications for class 123 subclass 66][List of Patents for class 123 subclass 66]66 Subclass 66 indent level is 1 Combined pump and motor cylinder
 [List of Pre Grant Publications for class 123 subclass 67][List of Patents for class 123 subclass 67]67 Subclass 67 indent level is 1 Divided pump discharge
 [List of Pre Grant Publications for class 123 subclass 68][List of Patents for class 123 subclass 68]68 Subclass 68 indent level is 1 Pump compression
[List of Pre Grant Publications for class 123 subclass 69R][List of Patents for class 123 subclass 69R]  69R Subclass 69R indent level is 1 Separate air and gas pumps
 [List of Pre Grant Publications for class 123 subclass 69V][List of Patents for class 123 subclass 69V]69V Subclass 69V indent level is 2 Lengthwise scavenging of cylinder by gas from cylinder head to piston
[List of Pre Grant Publications for class 123 subclass 70R][List of Patents for class 123 subclass 70R]  70R Subclass 70R indent level is 1 Pump and cylinder adjacent
 [List of Pre Grant Publications for class 123 subclass 70V][List of Patents for class 123 subclass 70V]70V Subclass 70V indent level is 2 Lengthwise scavenging of power cylinder
[List of Pre Grant Publications for class 123 subclass 71R][List of Patents for class 123 subclass 71R]  71R Subclass 71R indent level is 1 Pump and cylinder coaxial
 [List of Pre Grant Publications for class 123 subclass 71V][List of Patents for class 123 subclass 71V]71V Subclass 71V indent level is 2 Lengthwise scavenging of cylinder from head to piston
 [List of Pre Grant Publications for class 123 subclass 71VA][List of Patents for class 123 subclass 71VA]71VA Subclass 71VA indent level is 2 Sleeve valve
 [List of Pre Grant Publications for class 123 subclass 72][List of Patents for class 123 subclass 72]72 Subclass 72 indent level is 1 Pump and cylinder inclined
     Subclass indent level is 1 Rear compression
[List of Pre Grant Publications for class 123 subclass 73R][List of Patents for class 123 subclass 73R]  73R Subclass 73R indent level is 2 Crankcase
[List of Pre Grant Publications for class 123 subclass 74R][List of Patents for class 123 subclass 74R]  74R Subclass 74R indent level is 2 Cylinder
 [List of Pre Grant Publications for class 123 subclass 65PE][List of Patents for class 123 subclass 65PE]65PE Subclass 65PE indent level is 1 Exhaust ports
 [List of Pre Grant Publications for class 123 subclass 65A][List of Patents for class 123 subclass 65A]65A Subclass 65A indent level is 1 Inlet and exhaust ports in two or more planes
 [List of Pre Grant Publications for class 123 subclass 65B][List of Patents for class 123 subclass 65B]65B Subclass 65B indent level is 1 Pumps
 [List of Pre Grant Publications for class 123 subclass 65BA][List of Patents for class 123 subclass 65BA]65BA Subclass 65BA indent level is 1 Blowers
 [List of Pre Grant Publications for class 123 subclass 65PD][List of Patents for class 123 subclass 65PD]65PD Subclass 65PD indent level is 1 Port deflectors
 [List of Pre Grant Publications for class 123 subclass 65E][List of Patents for class 123 subclass 65E]65E Subclass 65E indent level is 1 Scavenging by inertia of exhaust gas and charging by use of pressure waves
 [List of Pre Grant Publications for class 123 subclass 65S][List of Patents for class 123 subclass 65S]65S Subclass 65S indent level is 1 Step piston (see sub. 59 BS)
[List of Pre Grant Publications for class 123 subclass 65V][List of Patents for class 123 subclass 65V]65V Subclass 65V indent level is 1 Valves
 [List of Pre Grant Publications for class 123 subclass 65VA][List of Patents for class 123 subclass 65VA]65VA Subclass 65VA indent level is 2 Sleeve valve
 [List of Pre Grant Publications for class 123 subclass 65VS][List of Patents for class 123 subclass 65VS]65VS Subclass 65VS indent level is 2 Sleeve driven by auxiliary crankshafts
 [List of Pre Grant Publications for class 123 subclass 65VB][List of Patents for class 123 subclass 65VB]65VB Subclass 65VB indent level is 1 Lengthwise scavenging list above
 [List of Pre Grant Publications for class 123 subclass 65VC][List of Patents for class 123 subclass 65VC]65VC Subclass 65VC indent level is 1 Lengthwise scavenging exhaust above
 [List of Pre Grant Publications for class 123 subclass 65VD][List of Patents for class 123 subclass 65VD]65VD Subclass 65VD indent level is 1 Intake and exhaust valve in top of cylinder
[List of Pre Grant Publications for class 123 subclass 65W][List of Patents for class 123 subclass 65W]65W Subclass 65W indent level is 1 Whirl through piston-controlled ports
 [List of Pre Grant Publications for class 123 subclass 65WA][List of Patents for class 123 subclass 65WA]65WA Subclass 65WA indent level is 2 Whirl in top of cylinders and lengthwise scavenging
 [List of Pre Grant Publications for class 123 subclass 65WV][List of Patents for class 123 subclass 65WV]65WV Subclass 65WV indent level is 1 Vacuum intake
 [List of Pre Grant Publications for class 123 subclass 65SP][List of Patents for class 123 subclass 65SP]65SP Subclass 65SP indent level is 1 Single port for inlet and exhaust
 [List of Pre Grant Publications for class 123 subclass 65EM][List of Patents for class 123 subclass 65EM]65EM Subclass 65EM indent level is 1 Exhaust manifolds
 [List of Pre Grant Publications for class 123 subclass 65P][List of Patents for class 123 subclass 65P]65P Subclass 65P indent level is 1 Ports
[List of Pre Grant Publications for class 123 subclass 306][List of Patents for class 123 subclass 306]306 MEANS TO WHIRL FLUID BEFORE, UPON, OR AFTER ENTRY INTO COMBUSTION CHAMBER
 [List of Pre Grant Publications for class 123 subclass 307][List of Patents for class 123 subclass 307]307 Subclass 307 indent level is 1 Structural projection on working piston causes whirling
 [List of Pre Grant Publications for class 123 subclass 308][List of Patents for class 123 subclass 308]308 Subclass 308 indent level is 1 Having multiple oxidant inlet means
 [List of Pre Grant Publications for class 123 subclass 309][List of Patents for class 123 subclass 309]309 Subclass 309 indent level is 1 Specific spark plug location
 [List of Pre Grant Publications for class 123 subclass 310][List of Patents for class 123 subclass 310]310 COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS
[List of Pre Grant Publications for class 123 subclass 311][List of Patents for class 123 subclass 311]311 FOUR-CYCLE
[List of Pre Grant Publications for class 123 subclass 312][List of Patents for class 123 subclass 312]312 Subclass 312 indent level is 1 Engine cylinder having a reciprocating sleeve valve
 [List of Pre Grant Publications for class 123 subclass 313][List of Patents for class 123 subclass 313]313 Subclass 313 indent level is 2 Having a junk ring seal
 [List of Pre Grant Publications for class 123 subclass 314][List of Patents for class 123 subclass 314]314 Subclass 314 indent level is 2 Having sleeve valve lubrication means
 [List of Pre Grant Publications for class 123 subclass 315][List of Patents for class 123 subclass 315]315 Subclass 315 indent level is 1 Multiple exhaust
 [List of Pre Grant Publications for class 123 subclass 316][List of Patents for class 123 subclass 316]316 Subclass 316 indent level is 1 Having subcharger associated with the cylinder
 [List of Pre Grant Publications for class 123 subclass 317][List of Patents for class 123 subclass 317]317 Subclass 317 indent level is 1 Crankcase compression of air or combustible mixture to be subsequently pumped into the working cylinder
 [List of Pre Grant Publications for class 123 subclass 318][List of Patents for class 123 subclass 318]318 Subclass 318 indent level is 1 Rear compression of air or combustible mixture to be subsequently pumped into the working cylinder
 [List of Pre Grant Publications for class 123 subclass 76][List of Patents for class 123 subclass 76]76 Subclass 76 indent level is 1 Scavenging
 [List of Pre Grant Publications for class 123 subclass 77][List of Patents for class 123 subclass 77]77 Subclass 77 indent level is 1 Single revolution
[List of Pre Grant Publications for class 123 subclass 78R][List of Patents for class 123 subclass 78R]  78R Subclass 78R indent level is 1 Variable clearance
[List of Pre Grant Publications for class 123 subclass 78A][List of Patents for class 123 subclass 78A]78A Subclass 78A indent level is 2 Piston in head adjusted mechanically
[List of Pre Grant Publications for class 123 subclass 78B][List of Patents for class 123 subclass 78B]78B Subclass 78B indent level is 2 Varying means is in the piston
 [List of Pre Grant Publications for class 123 subclass 78C][List of Patents for class 123 subclass 78C]78C Subclass 78C indent level is 2 Cylinder or sleeve moved
 [List of Pre Grant Publications for class 123 subclass 78D][List of Patents for class 123 subclass 78D]78D Subclass 78D indent level is 2 Auxiliary chamber
 [List of Pre Grant Publications for class 123 subclass 78E][List of Patents for class 123 subclass 78E]78E Subclass 78E indent level is 2 Varying means is in the connecting rod
 [List of Pre Grant Publications for class 123 subclass 78F][List of Patents for class 123 subclass 78F]78F Subclass 78F indent level is 2 Varying means is in the crankshaft
[List of Pre Grant Publications for class 123 subclass 79R][List of Patents for class 123 subclass 79R]  79R Subclass 79R indent level is 1 Single poppet valve
 [List of Pre Grant Publications for class 123 subclass 79A][List of Patents for class 123 subclass 79A]79A Subclass 79A indent level is 2 Rotary valve and poppet which extends through rotary valve
 [List of Pre Grant Publications for class 123 subclass 79C][List of Patents for class 123 subclass 79C]79C Subclass 79C indent level is 2 Concentric valves; relatively movable
[List of Pre Grant Publications for class 123 subclass 80R][List of Patents for class 123 subclass 80R]  80R Subclass 80R indent level is 1 Rotating valve
 [List of Pre Grant Publications for class 123 subclass 80BA][List of Patents for class 123 subclass 80BA]80BA Subclass 80BA indent level is 2 Rotary valve is perpendicular to cylinder
 [List of Pre Grant Publications for class 123 subclass 80BB][List of Patents for class 123 subclass 80BB]80BB Subclass 80BB indent level is 2 Rotary valve is parallel to cylinder
 [List of Pre Grant Publications for class 123 subclass 80C][List of Patents for class 123 subclass 80C]80C Subclass 80C indent level is 2 Sleeve valve
 [List of Pre Grant Publications for class 123 subclass 80D][List of Patents for class 123 subclass 80D]80D Subclass 80D indent level is 2 Disc valve
 [List of Pre Grant Publications for class 123 subclass 80DA][List of Patents for class 123 subclass 80DA]80DA Subclass 80DA indent level is 2 Rotary plug
[List of Pre Grant Publications for class 123 subclass 81R][List of Patents for class 123 subclass 81R]  81R Subclass 81R indent level is 1 Oscillating valve
 [List of Pre Grant Publications for class 123 subclass 81B][List of Patents for class 123 subclass 81B]81B Subclass 81B indent level is 2 Oscillating valve - not sleeve or disc
 [List of Pre Grant Publications for class 123 subclass 81C][List of Patents for class 123 subclass 81C]81C Subclass 81C indent level is 2 Sleeve valve
 [List of Pre Grant Publications for class 123 subclass 81D][List of Patents for class 123 subclass 81D]81D Subclass 81D indent level is 2 Disc valve
 [List of Pre Grant Publications for class 123 subclass 82][List of Patents for class 123 subclass 82]82 Subclass 82 indent level is 1 Rotating side shaft
 [List of Pre Grant Publications for class 123 subclass 83][List of Patents for class 123 subclass 83]83 Subclass 83 indent level is 1 Rotating transverse shaft
 [List of Pre Grant Publications for class 123 subclass 84][List of Patents for class 123 subclass 84]84 Subclass 84 indent level is 1 Adjacent supply and exhaust valves
 [List of Pre Grant Publications for class 123 subclass 85][List of Patents for class 123 subclass 85]85 Subclass 85 indent level is 1 Aligned supply and exhaust valves
 [List of Pre Grant Publications for class 123 subclass 86][List of Patents for class 123 subclass 86]86 Subclass 86 indent level is 1 Opposite supply and exhaust valves
 [List of Pre Grant Publications for class 123 subclass 87][List of Patents for class 123 subclass 87]87 Subclass 87 indent level is 1 Longitudinal valve and lever
 [List of Pre Grant Publications for class 123 subclass 88][List of Patents for class 123 subclass 88]88 Subclass 88 indent level is 1 Transverse valve and lever
 [List of Pre Grant Publications for class 123 subclass 89][List of Patents for class 123 subclass 89]89 Subclass 89 indent level is 1 Transverse valve and bell crank
[List of Pre Grant Publications for class 123 subclass 319][List of Patents for class 123 subclass 319]319 ENGINE SPEED REGULATOR
[List of Pre Grant Publications for class 123 subclass 320][List of Patents for class 123 subclass 320]320 Subclass 320 indent level is 1 Responsive to deceleration mode (e.g., engine acting as a brake)
[List of Pre Grant Publications for class 123 subclass 321][List of Patents for class 123 subclass 321]321 Subclass 321 indent level is 2 Valve timing altering means (e.g., axially sliding cam shaft)
 [List of Pre Grant Publications for class 123 subclass 323][List of Patents for class 123 subclass 323]323 Subclass 323 indent level is 2 Exhaust throttling or blocking
 [List of Pre Grant Publications for class 123 subclass 324][List of Patents for class 123 subclass 324]324 Subclass 324 indent level is 2 Part of the air or combustible mixture to the engine cylinder omitted
[List of Pre Grant Publications for class 123 subclass 325][List of Patents for class 123 subclass 325]325 Subclass 325 indent level is 2 Deceleration responsive cutoff of fuel to engine (e.g., pollution control)
 [List of Pre Grant Publications for class 123 subclass 327][List of Patents for class 123 subclass 327]327 Subclass 327 indent level is 2 Auxiliary air fed to the engine
 [List of Pre Grant Publications for class 123 subclass 328][List of Patents for class 123 subclass 328]328 Subclass 328 indent level is 2 Idle jet bypassed by a slight opening of the throttle
 [List of Pre Grant Publications for class 123 subclass 329][List of Patents for class 123 subclass 329]329 Subclass 329 indent level is 2 Having means to retard spark (e.g., ignition timing)
[List of Pre Grant Publications for class 123 subclass 330][List of Patents for class 123 subclass 330]330 Subclass 330 indent level is 1 Engine speed reduction by overriching the combustible mixture (e.g., choking engine)
 [List of Pre Grant Publications for class 123 subclass 331][List of Patents for class 123 subclass 331]331 Subclass 331 indent level is 2 By electric means
[List of Pre Grant Publications for class 123 subclass 332][List of Patents for class 123 subclass 332]332 Subclass 332 indent level is 1 Engine speed reduction by fuel cutoff
 [List of Pre Grant Publications for class 123 subclass 333][List of Patents for class 123 subclass 333]333 Subclass 333 indent level is 2 By electric means
[List of Pre Grant Publications for class 123 subclass 334][List of Patents for class 123 subclass 334]334 Subclass 334 indent level is 1 Engine speed reduction by partial or complete omission of the ignition
 [List of Pre Grant Publications for class 123 subclass 335][List of Patents for class 123 subclass 335]335 Subclass 335 indent level is 2 By electric means
 [List of Pre Grant Publications for class 123 subclass 336][List of Patents for class 123 subclass 336]336 Subclass 336 indent level is 1 Having plural throttle valve structure
 [List of Pre Grant Publications for class 123 subclass 337][List of Patents for class 123 subclass 337]337 Subclass 337 indent level is 1 Specific throttle valve structure
 [List of Pre Grant Publications for class 123 subclass 338][List of Patents for class 123 subclass 338]338 Subclass 338 indent level is 1 Fuel injection pump bypass control
[List of Pre Grant Publications for class 123 subclass 339.1][List of Patents for class 123 subclass 339.1]339.1 Subclass 339.1 indent level is 1 Idle speed control
 [List of Pre Grant Publications for class 123 subclass 339.11][List of Patents for class 123 subclass 339.11]339.11 Subclass 339.11 indent level is 2 By regulating spark ignition timing
 [List of Pre Grant Publications for class 123 subclass 339.12][List of Patents for class 123 subclass 339.12]339.12 Subclass 339.12 indent level is 2 And air-fuel ratio feedback controlled
 [List of Pre Grant Publications for class 123 subclass 339.13][List of Patents for class 123 subclass 339.13]339.13 Subclass 339.13 indent level is 2 Manual adjustment
[List of Pre Grant Publications for class 123 subclass 339.14][List of Patents for class 123 subclass 339.14]339.14 Subclass 339.14 indent level is 2 Electrically operated control means
 [List of Pre Grant Publications for class 123 subclass 339.29][List of Patents for class 123 subclass 339.29]339.29 Subclass 339.29 indent level is 2 By overriding injection pump governor
 [List of Pre Grant Publications for class 123 subclass 342][List of Patents for class 123 subclass 342]342 Subclass 342 indent level is 1 Regulator changes length of accelerator linkage
 [List of Pre Grant Publications for class 123 subclass 343][List of Patents for class 123 subclass 343]343 Subclass 343 indent level is 1 Regulator accessory (e.g., cleaner, adjusting tool, etc.)
 [List of Pre Grant Publications for class 123 subclass 344][List of Patents for class 123 subclass 344]344 Subclass 344 indent level is 1 Charge proportion varying (e.g., the fuel-air ratio is varied)
[List of Pre Grant Publications for class 123 subclass 345][List of Patents for class 123 subclass 345]345 Subclass 345 indent level is 1 By changing valve lift
 [List of Pre Grant Publications for class 123 subclass 346][List of Patents for class 123 subclass 346]346 Subclass 346 indent level is 2 Intake valve lift altered
[List of Pre Grant Publications for class 123 subclass 347][List of Patents for class 123 subclass 347]347 Subclass 347 indent level is 1 By changing valve timing
 [List of Pre Grant Publications for class 123 subclass 348][List of Patents for class 123 subclass 348]348 Subclass 348 indent level is 2 Intake valve timing altered
[List of Pre Grant Publications for class 123 subclass 349][List of Patents for class 123 subclass 349]349 Subclass 349 indent level is 1 Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control)
[List of Pre Grant Publications for class 123 subclass 350][List of Patents for class 123 subclass 350]350 Subclass 350 indent level is 2 Electrical sensing or regulating
[List of Pre Grant Publications for class 123 subclass 363][List of Patents for class 123 subclass 363]363 Subclass 363 indent level is 2 Mechanical sensor or regulator
[List of Pre Grant Publications for class 123 subclass 378][List of Patents for class 123 subclass 378]378 Subclass 378 indent level is 2 Fluidic sensor or regulator
 [List of Pre Grant Publications for class 123 subclass 394][List of Patents for class 123 subclass 394]394 Subclass 394 indent level is 2 By combustion air or air-fuel mixture cutoff
[List of Pre Grant Publications for class 123 subclass 395][List of Patents for class 123 subclass 395]395 Subclass 395 indent level is 1 Open loop condition responsive
[List of Pre Grant Publications for class 123 subclass 396][List of Patents for class 123 subclass 396]396 Subclass 396 indent level is 2 Resistance or override acts on input connection to regulator
 [List of Pre Grant Publications for class 123 subclass 399][List of Patents for class 123 subclass 399]399 Subclass 399 indent level is 2 Having an electrical device between input and speed regulator
 [List of Pre Grant Publications for class 123 subclass 400][List of Patents for class 123 subclass 400]400 Subclass 400 indent level is 2 Mechanical connection between input and speed regulator
 [List of Pre Grant Publications for class 123 subclass 401][List of Patents for class 123 subclass 401]401 Subclass 401 indent level is 2 Fluidic device between input and regulator
[List of Pre Grant Publications for class 123 subclass 402][List of Patents for class 123 subclass 402]