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Expired Canadian patentCanada

Monitoring, testing and operator controlling of active noise and vibration cancellation systems

CA 1322782 C · Owner: Landgarten, Harris B. · Inventors: Landgarten, Harris B.; Ziegler, Eldon W.

CIPO record

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Abstract From the Canadian patent

A monitoring capability may be provided integral with or separate from a vibration cancellation system to monitor or display input and output signals and transfer functions as well as spectral waveforms. Testing is performed by monitoring and displaying the input and generating appropriate test signals while further monitoring and displaying the input. The ability to modify the characteristics of the vibration cancellation system is included. -29-

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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 October 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 5, 2010.
  • 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, 1988
GrantedOctober 5, 1993
Term endedOctober 5, 2010
Patent numberCA 1322782 C
Classification (IPC)H03B29/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 14, 1988Patent grantedOct 5, 1993Term endedOct 5, 2010

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