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Expired Canadian patentCanada

Signal processor for and an auditory prosthesis having spectral to temporal transformation

CA 1312136 C · Owner: Van Den Honert, Christopher · Inventors: Van Den Honert, Christopher

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Abstract From the Canadian patent

Abstract of the Disclosure An auditory prosthesis (68) using and a signal processor (10) for an electrical input signal (12) designed to represent sound to a person. A plurality of filters (14, 16, 18) each passing a different center frequency is operatively coupled to receive the electrical input signal (12). Each of the plurality filters (14 16, 18), is less than critically damped providing an electrical output signal (20, 22, 24) which has an impulse response which is oscillatory. Thus, the plurality of filters (14 16, 18) generate a plurality of electrical signals (20 22, 24) which selectively replicate the temporal nerve discharge pattern of individually located auditory nerve fibers …

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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 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 1988
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1312136 C
Classification (IPC)H04R25/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 11, 1988Patent grantedDec 29, 1992Term endedDec 29, 2009

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.