Electronic device forming a programmable miniature hearing aid, in particular of the intraductal type
CA 2056036 C · Owner: Laurent, Pierre · Inventors: Flippe, Patrice; Laurent, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The programmable intraductal hearing aid includes a microphone, dynamically programmable filtering means an , adjustable power amplifier, and a sound reproduction transducer powered by a battery. The filtering means with controlled capacitors are made together with the programming memory and its interface in, the form of at least one integrated circuit including at least one oscillator associated with at least one d.c. voltage step-up transformer for energising the said memories the whole set being powered by a miniature low voltage battery. The power amplifier, powered by the same battery is made in a single integrated circuit provided with external decoupling capacitors.
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 22, 1991 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2013.
- 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.