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Expired Canadian patentCanada

Adaptive equalizer capable of effectively removing a remaining fading in an equalized signal

CA 2044707 C · Owner: Kurokami, Yuzo · Inventors: Kurokami, Yuzo

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In an adaptive equalizer (40) connected to a demodulator (14) to equalize a demodulated signal into an equalized signal in accordance with main and first through N-th controllable tap gains, where N represents a positive integer which is not less than one the main and, the first through the N-th controllable tap gains are produced dependent upon the demodulated and the equalized signals and are controlled by main and first through N-th parameters, respectively. A supplying circuit (42) supplies main and first through N-th values as the main and the first through the N-th parameters to the adaptive equalizer when the demodulator is put in a synchronization state. The supplying circuit …

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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 June 14, 1991 and granted February 20, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 14, 1991
GrantedFebruary 20, 1996
Term endedJune 14, 2011
Patent numberCA 2044707 C
Classification (IPC)H03D3/24 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedJune 14, 1991Patent grantedFeb 20, 1996Term endedJune 14, 2011

Sources & verification

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