Radio telecommunication apparatus
CA 2020870 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Kawashima, Kazuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radio telecommunication apparatus comprises a volume key for controlling volume, detecting means for generating a first detection signal in response to continuous push of the volume key, and generating a second detection signal in response to intermittent push of the volume key, and voice volume control means for performing control to increase the volume in response to one of the first and second detection signals and per-, forming control to decrease the volume in response to the other of the first and second detection 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
- Filed July 11, 1990 and granted November 2, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2012.
- 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.