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U.S. PATENT AND TRADEMARK OFFICE
Office of Electronic Information Products
Patent Technology Monitoring Division (PTMD)

Patenting By Geographic Region (State and Country),
Breakout By Technology Class

Count of 2000 - 2004 Utility Patent Grants,
By Calendar Year of Grant

- Explanation of Data -

Rank Ordered Listing of Technology Classes Receiving 1 or More Utility Patents During the Period
Originating From

MASSACHUSETTS

( patent origin is determined by the residence of the first-named inventor )
( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )

The following table displays technology classes and counts of associated patents, as distributed by the year of patent grant
Class Class Title 2000 2001 2002 2003 2004 Total
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 253 321 304 343 281 1502
435 Chemistry: Molecular Biology and Microbiology 232 273 255 229 175 1164
128 Surgery (includes Class 600) 119 105 110 112 113 559
370 Multiplex Communications 64 98 76 118 100 456
606 Surgery (instruments) 92 89 83 122 65 451
532 Organic Compounds (includes Classes 532-570) 76 76 92 73 62 379
711 Memory (Electrical Computers and Digital Processing Systems) 50 65 59 92 70 336
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 62 75 77 52 57 323
707 DP: Database and File Management or Data Structures (Data Processing) 42 48 70 82 75 317
709 Multicomputer Data Transferring or Plural Processor Synchronization (Electrical Computers and Digital Processing Systems) 61 54 57 59 77 308
250 Radiant Energy 33 47 49 67 105 301
604 Surgery (Medicators and Receptors) 52 48 49 85 57 291
345 Computer Graphics Processing and Selective Visual Display Systems 55 60 70 52 46 283
382 Image Analysis 51 76 43 40 54 264
359 Optics: Systems and Elements 35 39 68 60 60 262
473 Games Using Tangible Projectile 37 60 51 50 34 232
428 Stock Material or Miscellaneous Articles 54 35 42 54 40 225
714 Error Detection/Correction and Fault Detection/Recovery 34 33 33 64 58 222
073 Measuring and Testing 40 40 45 49 42 216
710 Input/Output (Electrical Computers and Digital Processing Systems) 37 38 23 45 65 208
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 47 40 49 34 37 207
385 Optical Waveguides 17 22 45 59 57 200
356 Optics: Measuring and Testing 36 24 30 49 42 181
361 Electricity: Electrical Systems and Devices 32 32 43 41 31 179
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 29 40 25 37 43 174
324 Electricity: Measuring and Testing 23 34 33 34 47 171
210 Liquid Purification or Separation 46 40 26 28 25 165
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 30 28 25 26 36 145
702 DP: Measuring, Calibrating, or Testing (Data Processing) 13 16 29 39 45 142
378 X-Ray or Gamma Ray Systems or Devices 27 34 33 13 29 136
713 Support (Electrical Computers and Digital Processing Systems) 14 35 18 26 36 129
219 Electric Heating 22 18 29 27 31 127
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 21 23 27 27 29 127
340 Communications: Electrical 18 29 26 23 28 124
379 Telephonic Communications 17 14 24 26 42 123
375 Pulse or Digital Communications 30 18 22 24 28 122
439 Electrical Connectors 40 21 18 20 22 121
715 DP: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing (Data Processing) 24 30 19 18 30 121
438 Semiconductor Device Manufacturing: Process 20 18 27 22 31 118
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 18 17 21 25 35 116
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 28 27 18 25 17 115
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 39 23 23 19 9 113
436 Chemistry: Analytical and Immunological Testing 19 14 23 31 25 112
427 Coating Processes 26 22 20 26 16 110
315 Electric Lamp and Discharge Devices: Systems 33 22 13 17 20 105
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 24 31 27 13 9 104
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 17 22 17 29 16 101
700 DP: Generic Control Systems or Specific Applications (Data Processing) 13 19 14 20 28 94
029 Metal Working 13 21 24 19 16 93
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 18 16 23 19 16 92
372 Coherent Light Generators 13 13 15 20 31 92
348 Television 14 20 21 18 18 91
455 Telecommunications 10 6 16 29 29 90
607 Surgery: Light, Thermal, and Electrical Application 10 23 23 15 18 89
174 Electricity: Conductors and Insulators 10 19 22 16 21 88
341 Coded Data Generation or Conversion 14 21 10 25 17 87
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 23 11 17 18 12 81
204 Chemistry: Electrical and Wave Energy 19 23 17 8 14 81
717 DP: Software Development, Installation, and Management (Data Processing) 20 22 15 5 19 81
313 Electric Lamp and Discharge Devices 12 16 13 20 19 80
310 Electrical Generator or Motor Structure 14 20 15 11 19 79
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 24 16 16 16 7 79
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 16 20 11 13 18 78
002 Apparel 17 15 13 14 11 70
062 Refrigeration 8 15 17 15 15 70
360 Dynamic Magnetic Information Storage or Retrieval 20 13 12 13 10 68
362 Illumination 15 13 14 15 11 68
137 Fluid Handling 12 19 11 12 13 67
333 Wave Transmission Lines and Networks 5 10 11 24 17 67
248 Supports (e.g., for holding articles, etc.) 22 11 14 12 5 64
280 Land Vehicles 14 11 19 12 6 62
206 Special Receptacle or Package 18 14 6 18 5 61
052 Static Structures (e.g., Buildings) 9 19 12 10 10 60
060 Power Plants 9 13 10 12 14 58
343 Communications: Radio Wave Antennas 10 14 10 11 12 57
381 Electrical Audio Signal Processing Systems and Devices 11 7 11 7 19 55
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 7 11 6 16 15 55
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 7 12 13 12 10 54
036 Boots, Shoes, and Leggings 13 9 10 10 11 53
118 Coating Apparatus 13 13 7 9 11 53
330 Amplifiers 6 5 15 14 13 53
101 Printing 7 10 12 10 13 52
363 Electric Power Conversion Systems 10 11 12 14 5 52
708 Arithmetic Processing and Calculating (Electrical Computers) 15 10 10 9 7 51
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 10 10 9 11 8 48
434 Education and Demonstration 15 6 9 9 8 47
106 Compositions: Coating or Plastic 8 7 9 10 12 46
042 Firearms 2 8 21 10 4 45
222 Dispensing (apparatus and process) 12 13 7 7 5 44
024 Buckles, Buttons, Clasps, Etc. 17 7 10 8 1 43
030 Cutlery 9 13 9 9 3 43
358 Facsimile and Static Presentation Processing 14 7 8 7 5 41
433 Dentistry 9 10 10 6 6 41
482 Exercise Devices 13 9 9 4 6 41
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 6 8 6 9 11 40
414 Material or Article Handling 13 6 8 7 6 40
015 Brushing, Scrubbing, and General Cleaning 10 3 8 8 10 39
398 Optical Communications 6 5 12 10 6 39
423 Chemistry of Inorganic Compounds 11 9 6 8 5 39
426 Food or Edible Material: Processes, Compositions, and Products 6 9 6 12 6 39
451 Abrading 10 6 10 8 5 39
347 Incremental Printing of Symbolic Information 11 7 6 8 6 38
415 Rotary Kinetic Fluid Motors or Pumps 3 6 13 10 6 38
416 Fluid Reaction Surfaces (i.e., Impellers) 4 14 8 7 5 38
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 4 2 9 15 8 38
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 8 7 6 10 6 37
040 Card, Picture, or Sign Exhibiting 9 2 7 8 9 35
123 Internal-Combustion Engines 4 9 7 7 8 35
396 Photography 10 7 3 10 5 35
227 Elongated-Member-Driving Apparatus 2 6 8 6 12 34
252 Compositions 6 7 7 4 10 34
297 Chairs and Seats 8 5 5 7 9 34
318 Electricity: Motive Power Systems 9 4 5 6 10 34
367 Communications, Electrical: Acoustic Wave Systems and Devices 5 8 9 5 7 34
351 Optics: Eye Examining, Vision Testing and Correcting 8 10 3 8 4 33
084 Music 5 8 8 4 7 32
119 Animal Husbandry 8 3 7 8 5 31
244 Aeronautics 2 10 3 14 2 31
446 Amusement Devices: Toys 3 7 8 8 5 31
719 Interprogram Communication or Interprocess Communication (Ipc) (Electrical Computers and Digital Processing Systems) 1 5 4 7 14 31
005 Beds 4 5 1 13 7 30
070 Locks 3 7 7 9 4 30
165 Heat Exchange 4 7 6 5 7 29
365 Static Information Storage and Retrieval 3 2 5 13 6 29
033 Geometrical Instruments 3 8 6 8 3 28
320 Electricity: Battery or Capacitor Charging or Discharging 10 6 8 3 1 28
505 Superconductor Technology: Apparatus, Material, Process 8 7 8 3 2 28
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 1 7 7 6 7 28
718 Virtual Machine Task or Process Management or Task Management/Control (Electrical Computers and Digital Processing Systems) 6 5 6 5 6 28
134 Cleaning and Liquid Contact with Solids 3 5 6 9 4 27
228 Metal Fusion Bonding 5 7 8 5 2 27
374 Thermal Measuring and Testing 5 6 8 6 2 27
380 Cryptography 6 10 5 1 5 27
706 DP: Artificial Intelligence (Data Processing) 3 5 6 9 4 27
114 Ships 8 3 4 5 6 26
242 Winding, Tensioning, or Guiding 4 7 7 3 5 26
431 Combustion 11 7 1 4 3 26
220 Receptacles 5 8 3 7 2 25
273 Amusement Devices: Games 7 4 5 3 6 25
323 Electricity: Power Supply or Regulation Systems 6 5 2 7 5 25
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 2 5 5 6 6 24
349 Liquid Crystal Cells, Elements and Systems 2 3 3 10 6 24
417 Pumps 6 7 4 4 3 24
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 9 3 1 6 4 23
251 Valves and Valve Actuation 5 4 3 6 5 23
277 Seal for a Joint or Juncture 4 8 8 0 3 23
369 Dynamic Information Storage or Retrieval 5 5 5 7 1 23
051 Abrasive Tool Making Process, Material, or Composition 6 6 3 4 3 22
160 Flexible or Portable Closure, Partition, or Panel 5 4 5 4 4 22
296 Land Vehicles: Bodies and Tops 3 7 3 4 5 22
326 Electronic Digital Logic Circuitry 5 3 6 6 2 22
392 Electric Resistance Heating Devices 6 7 6 1 2 22
401 Coating Implements with Material Supply 2 9 6 1 4 22
004 Baths, Closets, Sinks, and Spittoons 2 6 9 1 3 21
072 Metal Deforming 4 11 2 4 0 21
083 Cutting 7 7 0 0 7 21
216 Etching a Substrate: Processes 5 3 4 2 7 21
132 Toilet 9 4 3 1 3 20
211 Supports: Racks 4 4 2 4 6 20
034 Drying and Gas or Vapor Contact with Solids 4 4 5 2 4 19
053 Package Making 3 1 2 7 6 19
285 Pipe Joints or Couplings 3 3 9 1 3 19
307 Electrical Transmission or Interconnection Systems 3 4 4 5 3 19
366 Agitating (e.g., of articles and materials) 3 6 1 3 6 19
494 Imperforate Bowl: Centrifugal Separators 5 2 2 7 3 19
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 3 2 4 5 5 19
602 Surgery: Splint, Brace, or Bandage 4 2 6 1 6 19
055 Gas Separation 4 4 5 3 2 18
148 Metal Treatment 4 2 7 2 3 18
164 Metal Founding 4 4 4 4 2 18
336 Inductor Devices 3 1 4 4 6 18
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 0 2 3 4 9 18
463 Amusement Devices: Games 3 4 4 3 4 18
501 Compositions: Ceramic 4 4 2 2 6 18
136 Batteries: Thermoelectric and Photoelectric 4 6 2 2 3 17
224 Package and Article Carriers 4 2 8 1 2 17
331 Oscillators 2 5 2 3 5 17
353 Optics: Image Projectors 0 1 1 5 10 17
384 Bearings 5 3 6 3 0 17
095 Gas Separation: Processes 4 0 3 3 6 16
099 Foods and Beverages: Apparatus 1 2 1 8 4 16
138 Pipes and Tubular Conduits 6 3 1 2 4 16
180 Motor Vehicles 3 2 2 6 3 16
181 Acoustics 6 2 4 3 1 16
239 Fluid Sprinkling, Spraying, and Diffusing 4 3 2 2 5 16
386 Television Signal Processing for Dynamic Recording or Reproducing 6 0 3 3 4 16
403 Joints and Connections 3 5 3 4 1 16
725 Interactive Video Distribution Systems 3 2 3 2 6 16
065 Glass Manufacturing 0 1 1 8 5 15
074 Machine Element or Mechanism 4 5 0 3 3 15
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 2 5 0 5 3 15
169 Fire Extinguishers 4 3 3 1 4 15
221 Article Dispensing 3 2 2 4 4 15
294 Handling: Hand and Hoist-Line Implements 6 2 3 4 0 15
601 Surgery: Kinesitherapy 4 3 1 5 2 15
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 4 3 1 1 5 14
254 Implements or Apparatus for Applying Pushing or Pulling Force 1 3 2 5 3 14
312 Supports: Cabinet Structure 1 5 3 3 2 14
368 Horology: Time Measuring Systems or Devices 2 2 3 4 3 14
440 Marine Propulsion 8 4 0 2 0 14
043 Fishing, Trapping, and Vermin Destroying 5 1 2 3 2 13
200 Electricity: Circuit Makers and Breakers 3 2 3 2 3 13
016 Miscellaneous Hardware 0 4 1 4 3 12
182 Fire Escape, Ladder, or Scaffold 3 2 2 3 2 12
229 Envelopes, Wrappers, and Paperboard Boxes 2 3 2 2 3 12
237 Heating Systems 2 7 2 1 0 12
283 Printed Matter 2 4 5 0 1 12
066 Textiles: Knitting 5 4 0 0 2 11
081 Tools 3 3 1 1 3 11
108 Horizontally Supported Planar Surfaces 2 3 2 2 2 11
198 Conveyors: Power-Driven 6 1 3 0 1 11
337 Electricity: Electrothermally or Thermally Actuated Switches 0 1 4 1 5 11
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 4 3 0 3 1 11
037 Excavating 2 2 3 2 1 10
096 Gas Separation: Apparatus 1 3 2 1 3 10
122 Liquid Heaters and Vaporizers 1 0 2 3 4 10
162 Paper Making and Fiber Liberation 3 2 1 3 1 10
209 Classifying, Separating, and Assorting Solids 6 1 1 1 1 10
261 Gas and Liquid Contact Apparatus 6 3 0 1 0 10
290 Prime-Mover Dynamo Plants 3 2 4 1 0 10
355 Photocopying 2 2 2 3 1 10
454 Ventilation 2 3 1 1 3 10
126 Stoves and Furnaces 4 3 1 0 1 9
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 3 0 1 1 4 9
188 Brakes 2 3 3 1 0 9
441 Buoys, Rafts, and Aquatic Devices 1 0 1 4 3 9
049 Movable or Removable Closures 4 1 1 1 1 8
089 Ordnance 1 1 2 3 1 8
135 Tent, Canopy, Umbrella, or Cane 2 2 1 1 2 8
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 0 1 1 3 3 8
399 Electrophotography 1 0 2 4 1 8
405 Hydraulic and Earth Engineering 5 1 2 0 0 8
419 Powder Metallurgy Processes 2 1 0 3 2 8
445 Electric Lamp or Space Discharge Component or Device Manufacturing 2 1 1 1 3 8
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 2 2 1 2 1 8
047 Plant Husbandry 1 3 0 1 2 7
102 Ammunition and Explosives 1 0 2 2 2 7
110 Furnaces 1 2 2 1 1 7
116 Signals and Indicators 1 0 4 1 1 7
215 Bottles and Jars 1 1 3 1 1 7
241 Solid Material Comminution or Disintegration 1 3 1 1 1 7
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 1 1 3 2 0 7
404 Road Structure, Process, or Apparatus 1 0 1 3 2 7
409 Gear Cutting, Milling, or Planing 1 1 3 2 0 7
028 Textiles: Manufacturing 1 0 3 1 1 6
104 Railways 1 2 1 2 0 6
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 1 2 1 1 1 6
172 Earth Working 2 0 2 2 0 6
177 Weighing Scales 1 3 0 2 0 6
271 Sheet Feeding or Delivering 0 1 3 0 2 6
292 Closure Fasteners 0 2 1 2 1 6
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 0 1 1 2 2 6
044 Fuel and Related Compositions 1 1 1 0 2 5
125 Stone Working 2 1 1 0 1 5
236 Automatic Temperature and Humidity Regulation 1 1 0 0 3 5
338 Electrical Resistors 0 1 1 1 2 5
408 Cutting by Use of Rotating Axially Moving Tool 0 0 0 4 1 5
475 Planetary Gear Transmission Systems or Components 0 0 2 1 2 5
492 Roll or Roller 0 2 2 0 1 5
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 1 1 1 2 0 5
585 Chemistry of Hydrocarbon Compounds 0 2 1 1 1 5
192 Clutches and Power-Stop Control 0 1 1 1 1 4
267 Spring Devices 1 1 0 2 0 4
281 Books, Strips, and Leaves 2 1 0 0 1 4
332 Modulators 1 0 1 1 1 4
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 2 0 1 0 1 4
407 Cutters, for Shaping 2 0 1 1 0 4
432 Heating 0 2 2 0 0 4
476 Friction Gear Transmission Systems or Components 2 2 0 0 0 4
504 Plant Protecting and Regulating Compositions 2 2 0 0 0 4
007 Compound Hand Tools 0 1 2 0 0 3
056 Harvesters 1 0 0 2 0 3
057 Textiles: Spinning, Twisting, and Twining 1 1 1 0 0 3
068 Textiles: Fluid Treating Apparatus 0 3 0 0 0 3
124 Mechanical Guns and Projectors 0 1 0 1 1 3
131 Tobacco 2 0 0 0 1 3
139 Textiles: Weaving 2 0 0 0 1 3
140 Wireworking 0 1 1 1 0 3
144 Woodworking 2 0 0 1 0 3
175 Boring or Penetrating the Earth 1 0 0 1 1 3
178 Telegraphy 0 0 3 0 0 3
223 Apparel Apparatus 0 2 0 0 1 3
269 Work Holders 0 0 1 2 0 3
300 Brush, Broom, and Mop Making 0 0 1 2 0 3
322 Electricity: Single Generator Systems 0 2 1 0 0 3
376 Induced Nuclear Reactions: Processes, Systems, and Elements 0 3 0 0 0 3
400 Typewriting Machines 2 1 0 0 0 3
418 Rotary Expansible Chamber Devices 1 0 0 0 2 3
472 Amusement Devices 0 1 0 1 1 3
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 1 0 0 0 2 3
001 ** Classification Undetermined ** 1 0 0 1 0 2
012 Boot and Shoe Making 0 2 0 0 0 2
038 Textiles: Ironing or Smoothing 0 1 0 1 0 2
048 Gas: Heating and Illuminating 1 0 0 1 0 2
063 Jewelry 0 0 2 0 0 2
071 Chemistry: Fertilizers 0 0 2 0 0 2
082 Turning (e.g., for metal working) 0 1 0 1 0 2
087 Textiles: Braiding, Netting, and Lace Making 1 0 0 1 0 2
091 Motors: Expansible Chamber Type 0 1 0 1 0 2
092 Expansible Chamber Devices 0 0 0 0 2 2
100 Presses 1 1 0 0 0 2
112 Sewing 1 0 0 1 0 2
127 Sugar, Starch, and Carbohydrates 0 1 1 0 0 2
168 Farriery 0 0 0 1 1 2
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 1 1 0 2
212 Traversing Hoists 2 0 0 0 0 2
225 Severing by Tearing or Breaking 0 0 1 1 0 2
226 Advancing Material of Indeterminate Length 1 1 0 0 0 2
246 Railway Switches and Signals 0 1 1 0 0 2
249 Static Molds 0 0 0 0 2 2
289 Knots and Knot Tying 1 0 0 0 1 2
293 Vehicle Fenders 0 0 1 0 1 2
301 Land Vehicles: Wheels and Axles 0 0 2 0 0 2
383 Flexible Bags 1 1 0 0 0 2
420 Alloys or Metallic Compositions 0 0 0 1 1 2
450 Foundation Garments 0 0 0 1 1 2
470 Threaded, Headed Fastener, or Washer Making: Process and Apparatus 1 0 0 0 1 2
474 Endless Belt Power Transmission Systems or Components 1 0 1 0 0 2
477 Interrelated Power Delivery Controls, Including Engine Control 1 1 0 0 0 2
503 Record Receiver Having Plural Interactive Leaves or a Colorless Color Former, Method of Use, or Developer Therefor 1 0 0 1 0 2
076 Metal Tools and Implements, Making 0 0 0 1 0 1
109 Safes, Bank Protection, or a Related Device 0 1 0 0 0 1
150 Purses, Wallets, and Protective Covers 0 0 1 0 0 1
190 Trunks and Hand-Carried Luggage 1 0 0 0 0 1
191 Electricity: Transmission To Vehicles 0 0 1 0 0 1
194 Check-Actuated Control Mechanisms 0 1 0 0 0 1
202 Distillation: Apparatus 0 1 0 0 0 1
203 Distillation: Processes, Separatory 0 0 1 0 0 1
208 Mineral Oils: Processes and Products 0 0 1 0 0 1
218 High-Voltage Switches with Arc Preventing or Extinguishing Devices 1 0 0 0 0 1
232 Deposit and Collection Receptacles 1 0 0 0 0 1
256 Fences 1 0 0 0 0 1
266 Metallurgical Apparatus 0 0 0 0 1 1
295 Railway Wheels and Axles 0 1 0 0 0 1
298 Land Vehicles: Dumping 0 0 0 0 1 1
305 Wheel Substitutes for Land Vehicles 1 0 0 0 0 1
329 Demodulators 1 0 0 0 0 1
346 Recorders 1 0 0 0 0 1
352 Optics: Motion Pictures 0 0 0 0 1 1
406 Conveyors: Fluid Current 0 0 0 0 1 1
410 Freight Accommodation On Freight Carrier 0 0 0 0 1 1
412 Bookbinding: Process and Apparatus 1 0 0 0 0 1
452 Butchering 1 0 0 0 0 1
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 0 1 0 0 0 1
507 Earth Boring, Well Treating, and Oil Field Chemistry 1 0 0 0 0 1
588 Hazardous or Toxic Waste Destruction or Containment 0 0 1 0 0 1
ALL ALL CLASSES 3458 3668 3608 3909 3672 18315


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U.S. Patent and Trademark Office
Office of Electronic Information Products - PTMD
MDW 4C18; P.O Box 1450
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tel: (571) 272-5600
fax: (571) 273-0110
email: oeip@uspto.gov

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