Sound-transmitting apparatus
CA 2407417 A1 · Owner: Kear, Stephen · Inventors: Kear, Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus (10) for transmitting sound between a user and a communications device such as a mobile telephone comprises a non-electrical ear piece (13) connected via a tube (12) to an adaptor (22) which can be electrically connected to the mobile phone. A further tube (14) has a voice entry end (14b) and is coupled at the other end (14a) to the adaptor. Sound travels up tube (12) from the phone to the user and down tube (14) from the user to the phone.
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 April 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2023.
- 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.