Telephone having touch sensor for responding to a call
CA 2009164 C · Owner: Nec Corporation · Inventors: Norimatsu, Hidehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The telephone includes a touch sensor which may be attached on a handset. When the telephone receives a call meant therefor, the telephone alerts the user to the call by outputting a ringing tone through a speaker. In response to the call the telephone also transmits a, signaling tone to a base station which may be connected to the telephone over a radio channel and to a public switching telephone network. If the user touches on the touch sensor in response to the ringing tone the telephone, stops the signaling tone and thus informs the base station that the user has responded to the call.
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 February 2, 1990 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.