Housing for a portable radio telephone device
CA 2007141 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Musha, Atsushi; Hasegawa, Manabu; Inubushi, Toshiya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A housing for a portable radio telephone device in which a part thereof is exposed externally at a position recessed from an outer surface of a portable radio telephone device so that the part does not contact the skin whereby heat generated within the portable radio telephone device is efficiently radiated outside and a reliable operability is provided without the outersurface portions to thereof become too hot or cold to comfortably hold by hand.
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 January 4, 1990 and granted December 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 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.