Device for switching between a telephone handset and a substitute secondary apparatus
CA 2177273 C · Owner: Parment, Philippe · Inventors: Dubournais, Dominique; Parment, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switching device (5) for a telephone (1) with a handset (3) enabling a secondary apparatus (6) to be substituted for the handset (3). In one embodiment the switching device (5) includes a housing (50) with at least one recess (51 52) receiving a respective end of the handset (3). One of the recesses comprises a switch operated by engagement with the handset (3) to substitute the secondary apparatus for the handset (3). Said device is particularly useful for hands-free calling and teleconferencing.
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 November 30, 1994 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.