Intercarrier sound detecting apparatus for a television receiver
CA 1190976 A · Owner: Sony Corporation · Inventors: Meguro, Toshiaki; Ogawa, Masumi; Kawakami, Hiromi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intercarrier sound detecting apparatus for a television receiver includes an antenna for receiving a television signal; a tuner for selecting a desired frequency range of the received television signal from the antenna and producing a tuned signal having a video intermediate frequency component in response thereto; a filter for extracing the video intermediate frequency component from the tuned signal; video intermediate frequency amplifiers for producing a video intermediate frequency signal having an amplitude-modulated video carrier component; in response to the extracted video intermediate frequency component; a phase-locked loop which phase-locks the video intermediate frequency …
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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
- Granted July 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
- 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.