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Expired Canadian patentCanada

Data transmission system, receiver, and recording medium

CA 2239129 C · Owner: Nagayasu, Takayuki · Inventors: Nagayasu, Takayuki; Murakami, Keishi

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 data transmission system, a receiver and a, recording medium in which a re-coder (16) generates pseudo transmission signals based on the virtual received data after a decoder (15) generates virtual received data based on virtual decision data from a virtual decision circuit (12), and a soft-decision circuit (18) outputs soft-decision data so as to decrease the number of different bits between the pseudo transmission signals and the received signals and the, received data are generated based on the soft-decision data.

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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 May 29, 1998 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 29, 1998
GrantedDecember 18, 2001
Term endedMay 29, 2018
Patent numberCA 2239129 C
Classification (IPC)H03M13/00 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedMay 29, 1998Patent grantedDec 18, 2001Term endedMay 29, 2018

Sources & verification

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