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Expired Canadian patentCanada

Noise assessment of pcm regenerators

CA 1134915 A · Owner: Australian Telecommunications Commission · Inventors: Gibbs, Alan J.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Instruments are disclosed for testing the susceptibility of PCM regenerators to rear end and far end crosstalk noise. The instruments of the invention are more compatible with PCM system engineering rules since certain important PCM system parameters are synthesized in the circuitry. The instrument for measuring susceptibility to rear end crosstalk includes a filter having a voltage transfer function , and the instrument for measuring susceptibility to far end crosstalk includes a filter having a voltage transfer function .

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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 November 2, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1979
GrantedNovember 2, 1982
Term endedNovember 2, 1999
Patent numberCA 1134915 A
Classification (IPC)G01R31/28 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedNov 14, 1979Patent grantedNov 2, 1982Term endedNov 2, 1999

Sources & verification

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