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Expired Canadian patentCanada

Digital signal processing system in a modem

CA 1306012 C · Owner: Fujitsu Limited · Inventors: Endo, Kyoko; Kaku, Takashi

CIPO record

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

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Abstract From the Canadian patent

A reception signal processing system in a communicaton system transmitting a data under a predetermined baud-rate, including: a first unit operated by a first frequency for inputting the reception signal and for recovering loss components in the reception signal; a second unit operatively connected to the first unit and for responding to an output of the first unit, for determining a first ideal reception signal corresponding to the output of the first unit based on a second frequency corresponding to the baud-rate, and the first frequency being higher than the second frequency; and a third unit operatively connected to the first unit and second unit for responding to the first ideal …

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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.
FiledMarch 16, 1989
GrantedAugust 4, 1992
Term endedAugust 4, 2009
Patent numberCA 1306012 C
Classification (IPC)H04L25/03 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMarch 16, 1989Patent grantedAug 4, 1992Term endedAug 4, 2009

Sources & verification

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