Digital signal reproducing system
CA 2049905 C · Owner: Murabayashi, Noboru · Inventors: Murabayashi, Noboru; Takahashi, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital signal played back from a record medium is supplied to plural processing circuits which exhibit respectively different characteristics to impart different error rates to the digital signal processed by each circuit. The processed digital signal having the most favorable error rate is detected and the processing circuit which produces that signal is selected for use with further circuitry which recovers information from the processed digital signal.
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 August 26, 1991 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2013.
- 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.