Video recorder
CA 1050658 A · Owner: Arvin Industries · Inventors: Hall, Robert P. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A phase locked servo drive for a video recorder is synchronized with horizontal sync information from an incoming video signal. The sync information divided to a base frequency selected for a tachometer in the servo loop. A monostable multivibrator is used as the divider and is provided with a time constant which will permit it to divide any higher frequency sync signals to the same base frequency. The recorder thus automatically accepts and locks to appropriate horizontal sync from high resolution video signals.
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 March 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 1996.
- 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.