Cordless telephone apparatus
CA 2232773 C · Owner: Sanyo Electric Co. Ltd. · Inventors: Urasaka, Shinichi; Sakata, Takeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cordless telephone apparatus including a base unit and a sub unit connected with each other by wireless the base unit, has a memory for storing therein telephone number data which are referred to from the sub unit. When the base unit is busy the, transfer of a calling signal between the sub and base units is not performed. The access from the sub unit to the memory of the base unit is always permitted. The memory includes a callers area in which the telephone numbers of callers of received calls and the reception times of the calls are stored and a directory area in which frequently called telephone numbers and the number of placing calls of the numbers are stored. The telephone …
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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 November 28, 1994 and granted August 3, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2016.
- 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.