Ear warmer with a speaker system
CA 2535433 C · Owner: Tipp, Alan S. · Inventors: Le Gette, Brian E.; Reeb, David L.; Tipp, Alan S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame has an interior side and an exterior side. The frame is configured to extend around the back of a user's head. A first membrane is coupled to at least a portion of the interior side of the frame. In one embodiment a second , membrane is coupled to the first membrane. The first membrane and the second membrane define a receptacle and an opening that communicates with the receptacle. In one embodiment, a speaker is disposed in the receptacle. A first electrical wire has a first end electrically coupled to the speaker and a second end including a connector. The connector can be disposed proximate to the opening of the receptacle. The connector is configured to be electrically …
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 11, 2004 and granted May 1, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2026.
- 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.