Vtr with high-quality audio recording system
CA 1193003 A · Owner: Sony Corporation · Inventors: Kamai, Toshimitsu; Minegishi, Akira; Kono, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A video and audio signal recording apparatus includes frequency-modulators in which an audio signal for, example, a stereophonic left signal modulates first and, second carriers with different frequencies so as to provide first and second FM audio signals, respectively a first, mixing circuit for mixing the first FM audio signal with a video signal, such as, a composite color video signal having a frequency modulated luminance component signal in a frequency band separated from the band of a frequencyconverted chrominance component signal so as to provide an interval therebetween for accommodating the FM audio signals, a second mixing circuit for mixing the second FM audio signal with the …
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 September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 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.