Delay-in-frames correcting system in a pcm transmission line
CA 2076144 C · Owner: Fujitsu Limited · Inventors: Okuyama, Yuzo; Kakuma, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A delay-in-frames correction system in a switch unit in a PCM transmission line is used in the data communication field. It comprises a channel data storage unit for temporarily storing data corresponding to each channel on the output side or the input side of the switch unit in each direction in the PCM transmission line, and a data delay control unit for delaying data among the data corresponding to channels and stored in the channel data storage unit, the data corresponding to a plurality of channels, being outputted in order in the same frame and being delayed by the number of frames indicated by the most delayed data corresponding to channels and, for outputting frame correction …
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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 August 14, 1992 and granted September 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2014.
- 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
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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.