Telephone apparatus
CA 2006502 C · Owner: Someno, Noboru · Inventors: Yasuda, Hiroshi; Someno, Noboru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a telephone system, when a predetermined key of a handset unit is operated data stored in a memory incorporated within the handset unit is transferred to a memory incorporated within another handset unit so that, data that was manually input for storage in the memory of the first handset unit can be copied to the memory of a second handset unit, to eliminate the requirement to manually input the same data into the second unit.
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 December 22, 1989 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.