Speaker system
CA 2568189 C · Owner: Toa Corporation · Inventors: Iwayama, Ken
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speaker system includes an enclosure a first speaker unit for low frequency and a , plurality of second speaker units for high frequency. The enclosure includes a front plate , portion which is a baffle plate and a rear plate portion. A length of the rear plate portion in a , first direction perpendicular to a forward and backward direction is shorter than a length of , the front plate portion in the first direction. The first speaker unit and the second speaker , units are mounted to the front plate portion. The plurality of second speaker units are , arranged in the first direction. Vibration plates of the plurality of second speaker units are , located in the vicinity of the …
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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 April 6, 2005 and granted November 22, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2025.
- 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.