Muting circuit
CA 1106491 A · Owner: Sony Corporation · Inventors: Tokuhara, Masaharu; Kawakami, Hiromi; Hongu, Masayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A muting circuit for a television or AM signal receiver provided with a synchronous detector. A television receiver has a synchronous detecting circuit which is followed by a white noise inverter. The white noise inverter includes a level detecting circuit which inverts not only a white noise to a black noise but also mutes an audio signal when an output signal from the synchronous detector exceeds a predetermined level.
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
- Granted August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
- 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.