Wide-band communications system
CA 1190675 A · Owner: Siemens Aktiengesellschaft · Inventors: Strehl, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an optical wide-band network with subscriber-lines each comprising, two optical wave-guides running between an exchange and the subscriber-station only TV and/or stereo-sound wide-band signals are transmitted through one, optical wave-guide, from the exchange to the subscriber-station whereas, through the other optical wave-guide in both directions, are transmitted all digital communications narrow-band signals - for 64 kbit/s digital telephony facsimile, 8 kbit/s signalling, synchronizing data-transmission-, also pos-, sibly bi-directional video-telephony digital signals between the exchange and, the subscriber station. The digital communications signals in the two transmission …
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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 July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
- 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.