Channel multiplex demultiplex method and channel multiplex demultiplex unit
CA 2192923 C · Owner: Nec Corporation · Inventors: Ishikawa, Hajime
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
At a transmission side, an encoder 4 codes data of each channel and inserts a special character attributing to each channel. A character multiplex circuit 5a byte multiplex each channel for outputting. At a reception side, a character synchronization circuit 9 synchronized with a character by detecting the special character. A character demultiplex circuit 10a demultiplexes a signal by a character byte and obtains data of each channel. A channel identification circuit 11 identifies each channel by detecting the special character attributing to the channel without bit rotating for synchronization. A decoder 14 executes decoding without bit rotating and outputs a signal from a channel …
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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
- Filed December 13, 1996 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2018.
- 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.