Ear pad and earphone with the pad
CA 2482393 C · Owner: Seto, Shinji · Inventors: Seto, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The ear pad according to the present invention has a number of gathered sound-insulating walls (12) monolithically provided on an outer periphery of the basic body (11) made of an elastic material such as rubber, for instance, a silicon rubber or such as soft synthetic resins, for instance polypropylene in a ring , form with a prescribed space in the axial direction and made of the same material as that for the basic body. With this feature the ear pad according to the present invention can provide softness and adaptability to be set in an auditory meatus without stimulating sensitive portions thereof.
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 March 14, 2003 and granted September 16, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2025.
- 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.