Coded transmission system with initializing code
CA 2017555 C · Owner: Soejima, Tetsuo · Inventors: Iguchi, Kazuo; Amemiya, Shigeo; Shinomiya, Tomohiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coded transmission system wherein each bit of transmitted data having a logical value is coded depending on a coded result of a preceding bit containing a sender-side apparatus, a transmission line and a receiver-side apparatus. The transmission line connects the sender-side apparatus with the receiverside apparatus. In the sender-side apparatus a, resetting bit and a message are generated; a code of a bit which is last transmitted and is necessary to code a bit which is to be transmitted next, is memorized in a first preceding code memorizing circuit where the, content of said first preceding code memorizing circuit is reset to an initial code responding to the resetting bit. A coding …
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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 May 25, 1990 and granted September 17, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2012.
- 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.