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Classification Resources
 
Class   246RAILWAY SWITCHES AND SIGNALS
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[List of Pre Grant Publications for class 246 subclass 1R][List of Patents for class 246 subclass 1R]  1R MISCELLANEOUS
[List of Pre Grant Publications for class 246 subclass 2R][List of Patents for class 246 subclass 2R]  2R TRAIN DISPATCHING
 [List of Pre Grant Publications for class 246 subclass 19][List of Patents for class 246 subclass 19]19 STAFF AND TABLET SYSTEMS
[List of Pre Grant Publications for class 246 subclass 20][List of Patents for class 246 subclass 20]20 BLOCK-SIGNAL SYSTEMS
[List of Pre Grant Publications for class 246 subclass 21][List of Patents for class 246 subclass 21]21 Subclass 21 indent level is 1 Semi-automatic
[List of Pre Grant Publications for class 246 subclass 27][List of Patents for class 246 subclass 27]27 Subclass 27 indent level is 1 Automatic
[List of Pre Grant Publications for class 246 subclass 28R][List of Patents for class 246 subclass 28R]  28R Subclass 28R indent level is 2 Electric
[List of Pre Grant Publications for class 246 subclass 29R][List of Patents for class 246 subclass 29R]  29R Subclass 29R indent level is 3 Radiant energy
[List of Pre Grant Publications for class 246 subclass 31][List of Patents for class 246 subclass 31]31 Subclass 31 indent level is 3 Propulsion-current control
 [List of Pre Grant Publications for class 246 subclass 33][List of Patents for class 246 subclass 33]33 Subclass 33 indent level is 3 Single track
[List of Pre Grant Publications for class 246 subclass 34R][List of Patents for class 246 subclass 34R]  34R Subclass 34R indent level is 3 Varying-current track circuit
[List of Pre Grant Publications for class 246 subclass 41][List of Patents for class 246 subclass 41]41 Subclass 41 indent level is 3 Direct current, normally closed, track circuit
[List of Pre Grant Publications for class 246 subclass 58][List of Patents for class 246 subclass 58]58 Subclass 58 indent level is 3 Direct-current, normally open, track circuit
 [List of Pre Grant Publications for class 246 subclass 61][List of Patents for class 246 subclass 61]61 Subclass 61 indent level is 3 Superimposed propulsion current
[List of Pre Grant Publications for class 246 subclass 62][List of Patents for class 246 subclass 62]62 Subclass 62 indent level is 3 Cab signal or train control
[List of Pre Grant Publications for class 246 subclass 77][List of Patents for class 246 subclass 77]77 Subclass 77 indent level is 3 Counting in and out
[List of Pre Grant Publications for class 246 subclass 81][List of Patents for class 246 subclass 81]81 Subclass 81 indent level is 3 Propulsion-current signaling
 [List of Pre Grant Publications for class 246 subclass 86][List of Patents for class 246 subclass 86]86 Subclass 86 indent level is 3 Train-carried current supply
[List of Pre Grant Publications for class 246 subclass 87][List of Patents for class 246 subclass 87]87 Subclass 87 indent level is 3 Line-current supply
 [List of Pre Grant Publications for class 246 subclass 28C][List of Patents for class 246 subclass 28C]28C Subclass 28C indent level is 3 Ballast leakage
 [List of Pre Grant Publications for class 246 subclass 28E][List of Patents for class 246 subclass 28E]28E Subclass 28E indent level is 3 Economy use of line wire
 [List of Pre Grant Publications for class 246 subclass 28F][List of Patents for class 246 subclass 28F]28F Subclass 28F indent level is 3 Checking circuits
 [List of Pre Grant Publications for class 246 subclass 28G][List of Patents for class 246 subclass 28G]28G Subclass 28G indent level is 3 Light-out
 [List of Pre Grant Publications for class 246 subclass 28H][List of Patents for class 246 subclass 28H]28H Subclass 28H indent level is 3 Intermittent light
 [List of Pre Grant Publications for class 246 subclass 28K][List of Patents for class 246 subclass 28K]28K Subclass 28K indent level is 3 Transformer
[List of Pre Grant Publications for class 246 subclass 93][List of Patents for class 246 subclass 93]93 Subclass 93 indent level is 2 Combined fluid pessure and electric
[List of Pre Grant Publications for class 246 subclass 96][List of Patents for class 246 subclass 96]96 Subclass 96 indent level is 2 Electromechanical
[List of Pre Grant Publications for class 246 subclass 100][List of Patents for class 246 subclass 100]100 Subclass 100 indent level is 2 Fluid pressure
[List of Pre Grant Publications for class 246 subclass 102][List of Patents for class 246 subclass 102]102 Subclass 102 indent level is 2 Mechanical
[List of Pre Grant Publications for class 246 subclass 104][List of Patents for class 246 subclass 104]104 Subclass 104 indent level is 1 Manual
 [List of Pre Grant Publications for class 246 subclass 107][List of Patents for class 246 subclass 107]107 Subclass 107 indent level is 1 Recorders
[List of Pre Grant Publications for class 246 subclass 108][List of Patents for class 246 subclass 108]108 TIME INDICATION, AUTOMATIC
[List of Pre Grant Publications for class 246 subclass 111][List of Patents for class 246 subclass 111]111 GRADE-CROSSING TRACK PROTECTION
[List of Pre Grant Publications for class 246 subclass 118][List of Patents for class 246 subclass 118]118 DRAWBRIDGE PROTECTION
[List of Pre Grant Publications for class 246 subclass 120][List of Patents for class 246 subclass 120]120 ROADWAY-DEFECT PROTECTION
[List of Pre Grant Publications for class 246 subclass 122R][List of Patents for class 246 subclass 122R]  122R TRAIN-POSITION INDICATION
[List of Pre Grant Publications for class 246 subclass 125][List of Patents for class 246 subclass 125]125 ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES
[List of Pre Grant Publications for class 246 subclass 131][List of Patents for class 246 subclass 131]131 INTERLOCKING
[List of Pre Grant Publications for class 246 subclass 164][List of Patents for class 246 subclass 164]164 SLOTTING AND CONTROL
 [List of Pre Grant Publications for class 246 subclass 166][List of Patents for class 246 subclass 166]166 PILOT OR SIGNAL CARS
 [List of Pre Grant Publications for class 246 subclass 166.1][List of Patents for class 246 subclass 166.1]166.1 SIGNALLING BETWEEN OCCUPANTS OF A TRAIN
[List of Pre Grant Publications for class 246 subclass 167R][List of Patents for class 246 subclass 167R]  167R CAB SIGNAL OR TRAIN CONTROL
 [List of Pre Grant Publications for class 246 subclass 168][List of Patents for class 246 subclass 168]168 Subclass 168 indent level is 1 Train parting
 [List of Pre Grant Publications for class 246 subclass 168.1][List of Patents for class 246 subclass 168.1]168.1 Subclass 168.1 indent level is 1 Wheel slip
[List of Pre Grant Publications for class 246 subclass 169R][List of Patents for class 246 subclass 169R]  169R Subclass 169R indent level is 1 Train defect
[List of Pre Grant Publications for class 246 subclass 170][List of Patents for class 246 subclass 170]170 Subclass 170 indent level is 1 Derailment
[List of Pre Grant Publications for class 246 subclass 174][List of Patents for class 246 subclass 174]174 Subclass 174 indent level is 1 Highway or station, automatic
 [List of Pre Grant Publications for class 246 subclass 176][List of Patents for class 246 subclass 176]176 Subclass 176 indent level is 1 Switch signals
[List of Pre Grant Publications for class 246 subclass 177][List of Patents for class 246 subclass 177]177 Subclass 177 indent level is 1 Block entrance initiated
[List of Pre Grant Publications for class 246 subclass 182R][List of Patents for class 246 subclass 182R]  182R Subclass 182R indent level is 1 Speed-control systems
 [List of Pre Grant Publications for class 246 subclass 183][List of Patents for class 246 subclass 183]183 Subclass 183 indent level is 1 Manual-control systems
 [List of Pre Grant Publications for class 246 subclass 184][List of Patents for class 246 subclass 184]184 Subclass 184 indent level is 1 Service stop
 [List of Pre Grant Publications for class 246 subclass 185][List of Patents for class 246 subclass 185]185 Subclass 185 indent level is 1 Recording devices
[List of Pre Grant Publications for class 246 subclass 186][List of Patents for class 246 subclass 186]186 Subclass 186 indent level is 1 Motive-power control
 [List of Pre Grant Publications for class 246 subclass 189][List of Patents for class 246 subclass 189]189 Subclass 189 indent level is 1 Engineer's brake-valve actuation
 [List of Pre Grant Publications for class 246 subclass 190][List of Patents for class 246 subclass 190]190 Subclass 190 indent level is 1 Train-pipe-valve structure
 [List of Pre Grant Publications for class 246 subclass 191][List of Patents for class 246 subclass 191]191 Subclass 191 indent level is 1 Visual cab signals
[List of Pre Grant Publications for class 246 subclass 192R][List of Patents for class 246 subclass 192R]  192R Subclass 192R indent level is 1 Train mechanism
[List of Pre Grant Publications for class 246 subclass 201][List of Patents for class 246 subclass 201]201 Subclass 201 indent level is 1 Track trips
 [List of Pre Grant Publications for class 246 subclass 167A][List of Patents for class 246 subclass 167A]167A Subclass 167A indent level is 1 Train approach warning for work cars
 [List of Pre Grant Publications for class 246 subclass 167M][List of Patents for class 246 subclass 167M]167M Subclass 167M indent level is 1 Magnetic rail
 [List of Pre Grant Publications for class 246 subclass 167D][List of Patents for class 246 subclass 167D]167D Subclass 167D indent level is 1 Vehicle-vehicle distance measuring
 [List of Pre Grant Publications for class 246 subclass 208][List of Patents for class 246 subclass 208]208 CAR-DISPLAYED CROSSING SIGNALS
 [List of Pre Grant Publications for class 246 subclass 209][List of Patents for class 246 subclass 209]209 PASSENGERS' STATION SIGNALS
[List of Pre Grant Publications for class 246 subclass 210][List of Patents for class 246 subclass 210]210 TORPEDO MECHANISM
 [List of Pre Grant Publications for class 246 subclass 217][List of Patents for class 246 subclass 217]217 AUDIBLE SWITCH AND SIGNAL INDICATORS
[List of Pre Grant Publications for class 246 subclass 218][List of Patents for class 246 subclass 218]218 ELECTRIC ACTUATION
[List of Pre Grant Publications for class 246 subclass 257][List of Patents for class 246 subclass 257]257 FLUID-MOTOR ACTUATION
[List of Pre Grant Publications for class 246 subclass 262][List of Patents for class 246 subclass 262]262 MECHANICAL-MOTOR ACTUATION
[List of Pre Grant Publications for class 246 subclass 264][List of Patents for class 246 subclass 264]264 POINT THROWERS
[List of Pre Grant Publications for class 246 subclass 270R][List of Patents for class 246 subclass 270R]  270R VEHICLE-ENERGY ACTUATION
[List of Pre Grant Publications for class 246 subclass 271][List of Patents for class 246 subclass 271]271 Subclass 271 indent level is 1 Fluid transmission
 [List of Pre Grant Publications for class 246 subclass 273][List of Patents for class 246 subclass 273]273 Subclass 273 indent level is 1 Continuous-rail crossings
 [List of Pre Grant Publications for class 246 subclass 274][List of Patents for class 246 subclass 274]274 Subclass 274 indent level is 1 Switch-connected frogs
[List of Pre Grant Publications for class 246 subclass 275][List of Patents for class 246 subclass 275]275 Subclass 275 indent level is 1 Continuous-rail frogs
 [List of Pre Grant Publications for class 246 subclass 277][List of Patents for class 246 subclass 277]277 Subclass 277 indent level is 1 Automatic turnouts
     Subclass  indent level is 1 Switch stands, automatic
[List of Pre Grant Publications for class 246 subclass 292][List of Patents for class 246 subclass 292]292 Subclass 292 indent level is 1 Signals and gates, automatic
[List of Pre Grant Publications for class 246 subclass 314][List of Patents for class 246 subclass 314]314 Subclass 314 indent level is 1 Switches, automatic
 [List of Pre Grant Publications for class 246 subclass 358][List of Patents for class 246 subclass 358]358 Subclass 358 indent level is 1 Switch locks, automatic
[List of Pre Grant Publications for class 246 subclass 359][List of Patents for class 246 subclass 359]359 Subclass 359 indent level is 1 Train trips
 [List of Pre Grant Publications for class 246 subclass 270A][List of Patents for class 246 subclass 270A]270A Subclass 270A indent level is 1 Automatic switch actuation from or by vehicle
 [List of Pre Grant Publications for class 246 subclass 374][List of Patents for class 246 subclass 374]374 SAFETY SIDINGS
[List of Pre Grant Publications for class 246 subclass 375][List of Patents for class 246 subclass 375]375 CONTINUOUS-RAIL CROSSING
[List of Pre Grant Publications for class 246 subclass 382][List of Patents for class 246 subclass 382]382 SWITCH-CONNECTED FROGS
[List of Pre Grant Publications for class 246 subclass 393][List of Patents for class 246 subclass 393]393 SWITCH STANDS
[List of Pre Grant Publications for class 246 subclass 415R][List of Patents for class 246 subclass 415R]  415R SWITCHES
[List of Pre Grant Publications for class 246 subclass 454][List of Patents for class 246 subclass 454]454 CROSSINGS, FROGS, AND MATES
[List of Pre Grant Publications for class 246 subclass 473R][List of Patents for class 246 subclass 473R]  473R SIGNALS
 [List of Pre Grant Publications for class 246 subclass 489][List of Patents for class 246 subclass 489]489 MANUAL ACTUATION
 
FOREIGN ART COLLECTIONS
 
      FOR000          CLASS-RELATED FOREIGN DOCUMENTS
 
DIGESTS
 
 [List of Pre Grant Publications for class 246 subclass DIG1][List of Patents for class 246 subclass DIG1] DIG1 RADIANT ENERGY DEVICES
 [List of Pre Grant Publications for class 246 subclass DIG2][List of Patents for class 246 subclass DIG2] DIG2 THERMAL SENSING DEVICES