Filter for a hearing aid and a hearing aid
CA 2661144 C · Owner: Widex A/S · Inventors: Christensen, Leif Hojslet; Vestergaard, Jorn Eiler; Olsen, Jorgen Mejner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hearing aid comprises a receiver, an output port a conduit for , conveying sound to the port and a barrier element adapted for baffling entry of , earwax and moisture and for being acoustically transparent. The invention further , provides a barrier element for a hearing aid comprising a slab having an exterior , surface and through openings for transverse transmission of sound wherein the , exterior surface is super-hydrophobic.
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 August 31, 2006 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 31, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.