Electroacoustic transducer with diaphragm securing structure and method
CA 2383483 A1 · Owner: American Technology Corporation · Inventors: Croft, James J. Iii; Conrad, Terry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electroacoustic transducer which has at least one stator member (14 16) , with an operating surface (15, 17) and a suspended emitter diaphragm (12) spaced from the operating surface of the stator member to enable the diaphragm to oscillate in response to an applied signal voltage (19). The diaphragm has increased stiffness in a direction (31) along the diaphragm and within the emitter section to enable the emitter diaphragm to oscillate without applying tension in the direction of stiffness. A clamp member (22) secures the diaphragm to maintain the diaphragm in a fixed position relative to the stator to minimize distortion. The clamp member may be positioned to define several …
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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 August 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2022.
- 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.