Magnetic recording and/or reproducing system
CA 1069612 A · Owner: Sony Corporation · Inventors: Tsuchiya, Takao; Narahara, Hisaaki; Ishigaki, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus in which video signals having luminance and chrominance components are recorded in adjacent tracks on a recording medium, includes a circuit for generating at least first and second frequency converting carrier signals having the same frequency but being of opposite polarity; a frequency converter to receive the chrominance portion of the video signal; and a circuit to alternately apply the at least first and second frequency converting carrier signals in a predetermined sequence to the frequency converter for differently converting the carrier of the chrominance portion of the video signal, the sequence being selected to reduce cross-talk between the video signals when reproduced …
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.