Microphone expansion for background noise reduction
CA 2192498 C · Owner: Forgues, Scott L. · Inventors: Francon, Michael; Forgues, Scott L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an apparatus for reducing background noise in a telecommunications device, the telecommunications device including a microphone for receiving acoustic signals and generating corresponding electrical signals therefrom the acoustic signals, including voice signals and background noise signals. The apparatus of the present invention in one embodiment include an amplifier having an input for receiving the electrical signals from the microphone and an output said amplifier operable to receive, electrical signals at the first input and provide amplification to the electrical signals to produce amplified electrical signals. The amplifier is further operable to provide amplification at …
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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 10, 1996 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.