| Patents for B61L 7 - Remote control of local operating means for points, signals, or track-mounted scotch-blocks (350) |
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| 08/16/1990 | EP0381890A1 Current monitoring |
| 11/08/1989 | EP0341224A1 Apparatus for monitoring the state of a remotely controlled device |
| 11/02/1989 | DE3813538A1 Circuit arrangement for the monitored operation of two AC loads via a common supply line |
| 10/18/1989 | CN2046095U Digital automatic on/off device |
| 03/29/1989 | CN1031970A Electronic gate receiver |
| 02/28/1989 | US4808982 Facility for monitoring the operation of a signal lamp |
| 01/04/1989 | CN1030056A Remote-control system for driver-controlled switch |
| 11/17/1988 | DE3715478A1 Circuit arrangement for monitoring a set of points |
| 10/18/1988 | US4779071 System for transmitting commands |
| 06/30/1988 | DE3643226A1 Device for operating a plurality of electrical loads in a reliable manner in signalling terms |
| 06/29/1988 | CN86108418A Automatic microelectronic block equipment of time count code |
| 05/19/1988 | DE3638686A1 Method for controlling points drives in railway shunting systems |
| 05/19/1988 | DE3638681A1 Device for remote-monitoring rotary-current points drives |
| 05/19/1988 | DE3638680A1 Device for controlling points in gravity-shunting systems |
| 04/07/1988 | DE3632179A1 Circuit for monitoring signal lamps |
| 01/27/1988 | CN87207114U Branch railway squeeze protection phonic and lighting alarm |
| 11/19/1987 | DE3616851A1 Method and arrangement for reliable signalling operation of a light signal for multiple representation of signal indications |
| 11/11/1987 | CN86201635U Special alarm for railway and mines |
| 10/22/1987 | DE3612652A1 Circuit for centralised control and monitoring of a set of points with a plurality of compact devices whose action is distributed over the movable components of the set of points |
| 06/19/1987 | DE3608878A1 Circuit for the centralised control and monitoring of a set of points with a plurality of compact devices for setting, securing and monitoring the movable points components |
| 10/14/1986 | US4617662 Vital message system with unique function identification |
| 09/16/1986 | US4611775 Railway track switch control apparatus |
| 09/09/1986 | US4611291 Vital interface system for railway signalling |
| 03/05/1986 | CN85201698U Dynamic safety relay |
| 12/27/1985 | EP0165464A2 Circuit arrangement for operating a light signal in a railway system |
| 09/04/1985 | EP0153900A2 Control and protection of servoswitching of points with a telecontrol device or a local control device |
| 07/30/1985 | US4532509 Communication system having timer controlled field stations |
| 05/28/1985 | CA1187957A1 Vital communication system for transmitting multiple messages |
| 09/11/1984 | US4471486 Vital communication system for transmitting multiple messages |
| 02/21/1984 | CA1162652A1 Electronic interlocking system |
| 02/14/1984 | CA1162311A1 Two-channel data processing system for railway safety purposes |
| 08/23/1983 | US4400792 Dual-channel data processing system for railroad safety purposes |
| 01/04/1983 | CA1138969A1 Sequential checking of railway control signals |
| 10/26/1982 | US4356485 Device for the signal-technical secure control and monitoring of electrical loads |
| 08/18/1981 | US4284256 Sequential checking of railway control signals |
| 08/12/1981 | EP0033436A1 Dual-channel data processing system for ensuring the safety of railways |
| 07/01/1981 | EP0031046A2 Device for data secure control and supervision of electric equipments |
| 04/15/1980 | US4198678 Vehicle control unit |
| 12/12/1979 | EP0005971A2 Sequential checking of railway control signals |
| 12/12/1979 | EP0005968A2 Railway control communication system |
| 09/06/1979 | WO1979000631A1 A safety device for use with a railway signalling interlock arrangement |
| 07/31/1979 | CA1059602A1 Method for data exchange between a clock-controlled computer centre and an interlocking station in a railway system |
| 01/02/1979 | CA1045722A1 Communications system |
| 11/28/1978 | US4127845 Communications system |
| 09/12/1978 | CA1038484A1 Track circuit |
| 08/15/1978 | US4107550 Bucket brigade circuits |
| 06/06/1978 | US4093163 Switch for rail points |
| 02/22/1977 | US4009454 Fail-safe constant amplitude signal generator |
| 04/20/1976 | US3951364 Track circuit |
| 04/13/1976 | US3950728 Coded carrier remote control system |