What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
Enter a class/subclass code here to get a list of patent titles. Use
any of the following forms:
363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: 104 Class Title: RAILWAYS Subclass Subclass Number Title 2 TRACK LAYERS 3 .Built-up sections 4 .Portable shifter 5 .Distributers 6 ..Transverse tie placer 7.1 .Track raising car 7.2 ..With means to transversely shift track (i.e., aligning) 7.3 ..Under-track ballast sled or plow 8 .Sluer 9 .Tie replacer 10 .Tamper 11 ..Pneumatic injector 12 ..Car mounted 13 ..Hand tools 14 ...Pneumatic 15 .Joint welders 16 .Tie platers 17.1 .Track rail mounted spike driver 17.2 .Trail rail mounted rail anchor applicator 18 MOVING TRAIN 19 .Safety lander 20 .Passenger transfer 21 ..Revolving terminal 22 BALLOON 23.1 FLUID SUPPORTED CAR OR SIMULATED AERIAL VEHICLE 23.2 .Car supported by fluid current pushing against surface 24 SAILING DEVICES 25 ENDLESS TRAIN 26.1 CAR YARD 26.2 .Track brake 27 TERMINALS AND STATIONS 28 .Passenger 29 .Freight 30 .Platforms 31 ..Shifting 32.1 TRUCK CHANGER 33 .Wheel-gauge changers 34 VEHICLE BATTERY REPLACER 35 TURNTABLES 36 .Actuators 37 ..Fluid pressure 38 ..Electric control 39 ..Traction cable 40 ..Vehicle operated 41 ...Drive wheel 42 ...Gravity 43 ..Traction wheel 44 .Automobile 45 .Portable 46 .Bearings and pivots 47 .Locks 48 TRANSFER TABLESS 49 .Swinging 50 .Operating mechanism 51 LOCOMOTIVE SHED FIXTURES 52 .Smoke jacks 53 AMUSEMENT 54 .Gap jumpers 55 .Loop 56 .Helical 57 ..Rotating 58 .Moving-wave track 59 .Drifting tub 60 .Racing 61 .Horse simulation 62 .Physical training 63 .Tortuous alinement 64 ..Horizontal zigzag 65 ...Exchanging gears 66 ...Chain drive 67 .Switchback 68 .Bowl, cylinder or globe 69 .Chutes 70 ..Water dive 71 .Submarines 72 .Splasher 73 .Canals 74 .Rotary car on truck 75 ..Vertical axis 76 ..Horizontal axis 77 .Car in wheel 78 ..Traveling 79 .Seesaw track 80 .Seesaw car drive 81 .Swing car drive 82 .Passenger jumper 83 .Illusion vehicles 84 .Optical illusion 85 .Physical illusion 86 .Hydraulic effects 87 CABLE AND RIGID COMBINED 88 SELECTIVE DELIVERY 89 SUSPENDED 90 .Ferry 91 .Track systems 92 .Swing boom track 93 .Single-rail type 94 .Double inner rail 95 .Double outer rail 96 TROLLEY TRANSFER 97 .Beef-jack type 98 .Overhead crane 99 .Turntable type 100 .Horizontal end pivot 101 .Longitudinal pivot 102 .Sliding shift 103 .Swing stub 104 .Split point 105 .Rigid frog 106 TROLLEY RAILSS 107 .Two tread 108 ..Slotted tube 109 ..Integral 110 .Single tread 111 .Hangers 112 CABLE RAILS 113 .Gravity 114 .Extensible marine 115 .Hangers and saddles 116 ..Vertible movement 117 .Tension regulators and anchors 117.1 .With automatic stopping or reversing 118 MONORAIL 119 .With side guides 120 .Raised center rail 121 .Single top guide 122 DROP PICK UP 123 WAY SUSPENSION 124 ELEVATED STRUCTURE 125 POSTS AND TOWERS 126 PORTABLE ELEVATED 127 ELEVATORS 128 .Car 129 .Track control 130 SWITCHES 130.1 .For magnetically suspended vehicle 131 .Vertical 132 .Rack rail 133 DROPPINGS CATCHER 134 SLEDWAYS 135 .Roller track 136 .Ice track 137 TRAVELING TRACK 138.1 TUBULAR WAY 138.2 .Internal service device 139 TRUCK IN CONDUIT 140 SLOTTED CONDUIT 141 .Crossings 142 .Yokes 143 ..Concrete 144 ..Integral metallic 145 .Grip or plow traps 146 .Adjustable slots 281 MAGNETICALLY SUSPENDED CAR 282 .Propulsion means employed to suspend car 283 .By permanent magnets only 284 .Including means to sense or control car position or attitude with respect to guideway 285 .With cooling means 286 .Construction or composition of suspension elements 287 CAR-CARRIED PROPULSION SYSTEM 288 .Electric 289 ..With regenerative energy means 290 ..Linear motor 291 ...Suspension between truck and vehicle body 292 ...Propulsion by active guideway, e.g., linear synchronous motor, etc. 293 ...Including means to control gapp 294 ...Construction or composition of motor elements 295 ..External car control 296 ...Auxiliary function on car 297 ....Superimposed signal on same conductor 298 ...By block system 299 ...Of spacing between cars 300 ...Car-carried speed regulator 301 ...Of multiple trains on same track 302 ...Reversing of car movement or conductor current 303 ....By switch responsive to discrete means along guideway 304 ...Of steerable car 305 ...Of slot-guided car 154 .Hydraulic 155 .Pneumatic 156 ..Piston tube 157 ..Motor charging 158 ...Moving car 159 ....Longitudinal supply tube 160 .....Sliding-sleeve receiver 161 ..Sealing slot closers 164 TILTING TRACK 165 TRACTION 162 .Pusher 163 ..Rotary 166 .Longitudinal rotary shafts 167 .Helical 168 .Transverse live roll 169 .Reciprocating farm tool 170 .Truck distribution 171 ..Two-wheel type 172.1 .Chain 172.2 ..Tow pin or mast 172.3 ..Beneath vehicle 172.4 ..Suspended 172.5 ..Chain construction 173.1 .Cable 173.2 ..Ski tow 174 ..Counterbalanced system 175 ...Weight 176 ..Mule car 177 ..Mail 178 ..Drive and control 179 ...Signals 180 ..Running and carrying cable 181 ...Mail 182 ..Clearing-way hangers 183 ..Drum-wind draft 184 ..At switches 185 ..Crossing conduit 186 ...Cable depressors 187 ...Auxiliary car propulsion 188 ..At swing bridges 189 ..Curves 190 ...Auxiliary car propulsion 191 ...Horizontal pulley 192 ...Double-rope system 193 ..Draft-cable coupling 194 ..Slot closerss 195 ..Slot switches 196 ..Take-ups 197 ..Supporting pulley 198 ..Cable shifters 199 ..Cable lifters 200 ..Cable clips 201 ...Strand engaging 202 ..Grippers 203 ...Pneumatically operated 204 ...Automatic grip control 205 ....Trip lever 206 .....Toggle-operated jaw 207 ....Releasable pawl 208 ....Weight-operated jaw 209 ....Spring-pressed jaw 210 ....Screw operated 211 ....Cam operated 212 ....Wedge operated 213 ...Longitudinal buffer 214 ...Laterally movable jaws 215 ....With guide rollers 216 ...Pivoted and fixed jaws 217 ...Forceps 218 ...Vertically movable jaws 219 ....Pawl lever and link 220 ....With guide rollers 221 .....Pawl lever and link 222 ...Wedge 223 ...Screw 224 ...Cam 225 ...V-clips or hooks 226 ...Friction belt 227 ...Overstepping 228 ....Revolving 229 ...Rollers 230 ....Power transmitting 231 ....Laterally movable 232 ....Vertically movable 233 .....Opposing twin 234 .....Staggered 235 ...Whelp wheel 236 ...Sprocket wheel 237 ...Sprocket belt 238 ...Drive stops on car 239 ...Cable-driving stops 240 ..Cable construction 241 SEAT-GUARD CONTROL 242 DERAILMENT GUARDS 243 .Supplemental car wheels and rails 244 .Inclined wheels 244.1 .Furrow feelers 245 .Guide rollers 246 ..Rail interlock 247 ..Horizontal thrust only 248 .Rail-interlocking lugs 249 CAR STOPS 250 .Special track 251 ..Car retainingg 252 .Releasable feed 253 ..Alternate 254 .Bumpers 255 ..Counterweight 256 ..Fluid pressure 257 .Displaceable chock 258 .Rail-clamp chocks 259 .Sliding 260 .Wheel skid 261 CAR-ATTACHED DERAILER 262 CAR REPLACER 263 .Car attached 264 .Special track 265 .Two-way 266 ..With rollers 267 ..Double 268 .One way 269 ..Symmetrical 270 ..Saddles 271 ..Pivoted ramp 272 .Articulated extension 273 .Shifting jack 274 .Rail clamps 275 HOSE BRIDGES 276 .Overhead 277 .Under rail 279 TRACK CLEARERS 280 .Conduit 306 WITH RUNNING GEAR 307 MISCELLANEOUS * ****************************** * DIGEST * ****************************** DIG 1 Toy railroad