Time division multiplex telecommunication exchange
CA 1066396 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Kampen, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Time division multiplex telecommunication exchange in which the line circuit for each incoming transmission channel comprises a separate comparator to compare each bit group received on that channel with the preceding bit group on that channel. Further, the line circuit comprises gate means for preventing the bit group from being supplied to the common bus line of the TDM telecommunication exchange when the comparator detects equality. The switching device selects and allocates a frame time division multiplex time slot only in response to the passage of a bit group through said gate means. The line circuits for the outgoing transmission channels comprise means for the retransmission of a …
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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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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.