Transmission system between two terminal stations through a transmission line including low-frequency cross-talk supression circuits
CA 1078460 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Duimelaar, Jasper H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transmission system for transmitting signals modulating a carrier between two main stations via parallel coaxial lines the inner conductors and the non-earthed outer conductors of which are connected to the earthed main stations via capacitors. The main stations contain low-frequency Signal sources which in parallel with direct-current supply sources are connected to the supply current loop for the repeaters included in the coaxial lines. The low-frequency cross-talk due to the low frequency signals is suppressed by means of compensating circuits. -11-
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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 May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
- 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.