Hearing device
CA 2388321 A1 · Owner: Phonak Ag · Inventors: Vonlanthen, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a hearing device comprising a microphone (2) a , signal processing unit (4), an earphone (5) with two openings (8,9) and an energy storage unit (3). The microphone (2) is connected to the signal processing unit (4) which is in turn connected to the earphone (5). Means (7,12,10) are also provided to allow the acoustic signals produced in the earphone (5) to be propagated from one of the openings (8) into the auditory canal of the person wearing the hearing device. The invention is characterized in that other means (6,11) are also provided to enable the second opening (9) of the earphone (5) to be linked to the outside world when the hearing device is inserted …
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 8, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2021.
- 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.