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Expired Canadian patentCanada

Digital communication apparatus

CA 1301274 C · Owner: Sonetaka, Noriyoshi · Inventors: Sonetaka, Noriyoshi

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

A digital communication apparatus includes a transmitter section, a receiver section and a controller. In the transmitter section an error detection encoder for, adding a check bit to a signal to be transmitted is arranged on the input stage of an error correction encoder. The receiver section includes an error detection decoder arranged on the output stage of an error correction decoder, and a gate circuit for receiving outputs from a unique word detector and the error detection decoder and, for outputting a signal informing that a unique word is detected and no bit error is present. The controller controls the operation timing of the transmitter and receiver sections. The controller also …

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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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 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.
FiledMay 27, 1988
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1301274 C
Classification (IPC)H04L1/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 27, 1988Patent grantedMay 19, 1992Term endedMay 19, 2009

Sources & verification

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