| Patents for B61L 25 - Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus (2,273) |
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| 06/30/1981 | US4276572 Automatic message announcement system |
| 06/10/1981 | EP0030121A1 Transit vehicle control apparatus and method |
| 04/28/1981 | US4264927 Freight car identification method |
| 04/21/1981 | US4263595 Apparatus for identifying objects and persons |
| 04/21/1981 | US4262599 Conveyor system with a maintenance station |
| 04/07/1981 | CA1098989A1 Detection plate for an identification system |
| 02/03/1981 | US4248396 Method and apparatus for detecting railroad cars |
| 01/27/1981 | CA1094672A1 Wayside oriented moving block |
| 12/30/1980 | US4242661 Device for registration of objects |
| 11/04/1980 | US4232318 Duplex microwave radio communication system |
| 11/04/1980 | CA1089059A1 Train position indicator |
| 08/12/1980 | US4217549 Device for two-way information link |
| 07/29/1980 | CA1082816A1 Device for suppressing multiple registration |
| 07/09/1980 | EP0012917A1 Homodyne transmission system |
| 07/08/1980 | US4212013 Duplex-transmitter receiver arrangement |
| 06/24/1980 | US4209783 Object identification system |
| 06/24/1980 | CA1080332A1 Device for reducing the risk of transmission errors in an information-transmitting system |
| 06/24/1980 | CA1080331A1 Device for reducing the risk of transmission errors in an information-transmitting system |
| 06/10/1980 | CA1079404A1 Method and apparatus for identifying objects |
| 05/27/1980 | US4205326 Data communication apparatus |
| 05/20/1980 | CA1078062A1 Pulse width detection circuit for electro-optical label reading system |
| 04/01/1980 | US4196418 Detection plate for an identification system |
| 02/05/1980 | US4187465 Device for protection against transmission errors in an information transmission system |
| 01/09/1980 | EP0006691A1 Object identification system |
| 01/08/1980 | CA1069606A1 Foreground subject-identifying apparatus |
| 11/28/1979 | EP0005534A1 Device for identifying objects and persons |
| 10/23/1979 | CA1065027A1 Interrogation and response data transmission system |
| 10/16/1979 | CA1064617A1 Self-cleaning label for automatic object identification system |
| 10/02/1979 | CA1063694A1 Identifying location of vehicles |
| 10/02/1979 | CA1063676A1 Transponder system |
| 09/04/1979 | US4166599 Wayside oriented moving block |
| 08/21/1979 | CA1060954A1 Transponder system for the transfer of signalling information for rail-bounded vehicles |
| 07/17/1979 | CA1058728A1 Object identification system |
| 07/10/1979 | US4160522 Automatic car identification system |
| 07/10/1979 | CA1058303A1 Method and apparatus for driving a vehicle in a closed circuit |
| 06/05/1979 | CA1056059A1 Variable color label for object identification system |
| 05/29/1979 | CA1055588A1 Transponder for an automatic vehicle identification system |
| 04/10/1979 | CA1052462A1 Train position indication |
| 04/04/1979 | EP0001229A1 System for directing conveying devices to a maintenance station |
| 02/06/1979 | US4138676 Method and device for increasing the security against transmission errors in an information transmission system |
| 01/16/1979 | US4134538 Process and apparatus for identification of objects |
| 12/05/1978 | US4128218 Method of direction finding and direction indication of railbound vehicles |
| 11/28/1978 | CA1043189A1 Fabrication techniques for multilayer ceramic modules |
| 10/17/1978 | US4121208 Device for increasing the safety with respect to transmission faults in an information transmission system |
| 08/22/1978 | CA1037124A1 Information transmission system using a high frequency signal and its d.c. component and a harmonic |
| 08/01/1978 | US4104630 Vehicle identification system, using microwaves |
| 05/30/1978 | US4092731 Device for suppressing multiple registrations in a data store |
| 04/18/1978 | CA1029829A1 Anti-collision device for moving vehicles |
| 02/21/1978 | US4075632 Interrogation, and detection system |
| 01/24/1978 | US4070672 Answering device for a system for the automatic wireless transmission of multi-position data between interrogation devices and answering devices movable with respect to one another |
| 01/24/1978 | US4070584 Object-identification system with sequentially activated photocell array |
| 01/17/1978 | US4069472 Foreground subject-identifying apparatus |
| 01/10/1978 | US4068232 Passive encoding microwave transponder |
| 01/03/1978 | US4066877 Procedure and system for driving a vehicle |
| 08/02/1977 | US4040053 Transponder system for the transfer of signalling information for rail-bounded vehicles |
| 07/26/1977 | US4038653 Train position indicator |
| 06/07/1977 | US4027840 Vehicle position indicator with radar interrogation each of spaced transponders disposed along a pathway for the vehicle |
| 05/24/1977 | US4024629 Fabrication techniques for multilayer ceramic modules |
| 04/19/1977 | US4019181 Transponder system |
| 01/11/1977 | US4002889 Self-cleaning label for automatic object identification system |
| 12/21/1976 | US3999043 Pulse width detection circuit for electro-optical label reading system |
| 11/02/1976 | US3988991 Conveyor system utilizing shielded reader units |
| 10/05/1976 | US3984806 Location systems |
| 09/21/1976 | US3982275 Read-write apparatus for use in a conveyor control |
| 09/07/1976 | US3979091 Communication system for guideway operated vehicles |
| 06/22/1976 | US3964702 Anti-collision safety device for a passenger transport system on tracks |
| 06/15/1976 | US3964024 Transponder for an automatic vehicle identification system |
| 05/25/1976 | US3959792 Device for the facilitation and simplification of the adjustment of resonators of an answering device in a microwave railroad vehicle identification system |
| 05/18/1976 | US3958104 Multiplexed optical scanner system |
| 04/20/1976 | US3951983 Phenoxypropanolpiperazines |
| 03/02/1976 | US3941338 Directional wheel detector |
| 02/24/1976 | US3940057 Pressure cooking apparatus |
| 01/27/1976 | US3935432 Variable color label for object identification system |