Peritympanic hearing instrument
CA 2318922 A1 · Owner: Sarnoff Corporation · Inventors: Sjursen, Walter Paul; Leedom, Marvin Allan; Mahoney, Derek Dwayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hearing instrument is adapted for positioning in the external auditory canal of a human proximal to the tympanic membrane. It includes a substantially rigid shell and a relatively flexible tip member. The tip member includes a hollow body portion defining an elongated passage for the communication of acoustic signals through the tip member. The hollow body portion of the tip member is sufficiently deformable so that an axis of the passage substantially conforms to an axis of the external auditory canal upon insertion. The hollow body is also significantly rigid to resist substantial collapse of the passage upon such insertion. The axis of the passage defined by the hollow body …
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 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.