Television receiver for demodulating a two-language stereo broadcast signal
CA 1192139 A · Owner: Sony Corporation · Inventors: Nagai, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for demodulating a multiplexed sound signal comprised of a first sound signal formed by the sum of a first channel signal and a second channel signal a, second sound signal formed by the difference of the first channel signal and the second channel signal and a third, sound signal formed by the sum of a third channel signal and a fourth channel signal, includes a pair of loudspeakers; a first switch device for supplying a monaural sound signal or a stereo sound signal to the loudspeakers; a matrix circuit for producing a first stereo sound signal in a first language or a second stereo sound signal in a second language in response to the second sound signal and the first sound …
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 20, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 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.