Handset transmitter for communication equipment
CA 2009293 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Oku, Hidenori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmitter for communication equipment such as a telephone including a casing with a speaker piece. The speaker piece is provided with a plurality of outer microphone through holes. An air chamber housing is arranged on an inner surface of the speaker piece and includes an air chamber communicating to the outer microphone holes. The air chamber housing has an inner microphone hole formed through it to open at an upper surface thereof. A microphone holder is integrally formed with the upper surface of the air chamber housing to communicate to the inner microphone hole. The microphone holder is adapted to receive a condenser microphone. A jack is integrally erected on the upper surface of …
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 5, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.