Transponder system for the transfer of signalling information for rail-bounded vehicles
CA 1060954 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Olsson, Kjell O.I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transponder system with ensured synchronization for a railway signalling system, comprising an interrogating station, from which an interrogation signal is transmitted continuously, and a responder station which in response to the interrogation signal repeatedly retransmits a coded information reply signal to the interrogating station synchronization being achieved, by starting each information transmission by means of a special start signal generated in the interrogating station as a result of a special bit sequence retransmitted from the responder station. In normal operation the said bit sequence is generated immediately after the retransmission of a message or word and indicates the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.