Remote control radio system
CA 1075772 A · Owner: Westport International · Inventors: Hellman, Robert R.; French, Douglas M.
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 system for individually adjusting a plurality of remotely located serve units according to the position of a manual control for each serve unit by broadcasting a carrier wave that is switched on and off for division into repeating sequences with the reset signal to repeat a sequence having a short broadcast duration followed by a long silent period and in which the shifting of the control from one serve unit to the next in a sequence is directed by the leading edge of a broadcast period that occurs in sequence for each serve unit and which is of the same duration as the reset broadcast signal to thereby decrease the total broadcast time for each sequence while …
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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 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.