Noise reduction device in an electroacoustic system
CA 1293454 C · Owner: Societe A Responsabilite Limitee: Elison · Inventors: Imreh, Miklos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The device comprises at least one correction circuit interposed in the electroacoustic system and comprising a band-pass filter receiving an input signal, a compressor limiter circuit connected to the output of the band-pass filter a threshold, detector circuit connected to the output of the compressor-limiter circuit and looped thereon in order to allow compression by said, compressor limiter circuit, of the signal issued from the band-pass filter, only if the input signal exceeds a predetermined threshold and a summing-inverter circuit to which is applied on the one, hand, the signal issued from said compressor limiter circuit and, on the other hand, via an inverter circuit the input …
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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
- Granted December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.