Microphone systems of reduced in situ acceleration sensitivity
CA 2193331 C · Owner: Tibbetts, George C. · Inventors: Tibbetts, George C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electroacoustic assembly comprising a microphone having a diaphragm and supported on a face plate susceptible to vibratory effects. Vibration sensitivity is reduced, by opposing the pressure effects on the diaphragm caused on the one hand, by , vibration of, the assembly in the ambient air mass and by vibration of the air mass leading from the, ambient air mass to the diaphragm and on the other hand, by vibration of the effective, mass of the diaphragm, generally augmented with additional mass and including , the, effect of the internal air mass adjacent the diaphragm. Applications include hearing aids in, which the microphone and its support are mechanically coupled to receiver …
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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 December 18, 1996 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2018.
- 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.