Phase locked subcarrier regenerator
CA 2016463 C · Owner: Shiratsuchi, Shinichi · Inventors: Shiratsuchi, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for generating a signal having a predetermined frequency relationship with a subcarrier includes a counter for counting cycles of said subcarrier. Count values from the counter are coupled as address values to a memory circuit. The memory circuit is preprogrammed to provide a signal having the desired frequency responsive to successive address values applied by the counter.
Read the whole patent
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 10, 1990 and granted January 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 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.