Speaker system having an undulating rigid speaker enclosure
CA 2277024 C · Owner: Wiener, David · Inventors: Wiener, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speaker system includes a rigid elongate speaker enclosure (12) having first and second ends, a speaker driver (18) mounted at the first end and directed outward, and a sound dispersion assembly (20) mounted over the speaker driver. The speaker enclosure has a wall between the first and second ends which is provided with a plurality of undulations (36 38). The undulations define , outer peaks and inner valleys. The first end preferably includes a curved surface which curves back from the plane of the driver. The second end of the enclosure is preferably provided with a port (42) but may also be provided , with another driver directed outward. The enclosure is preferably molded from …
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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 8, 1998 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2020.
- 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.