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Expired Canadian patentCanada

Apparatus and method for digital to analog signal conversion using ananalog to digital signal converter

CA 1301344 C · Owner: American Standard Inc. · Inventors: Olson, John C.

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Abstract From the Canadian patent

Title, APPARATUS AND METHOD FOR, DIGITAL TO ANALOG SIGNAL CONVERSION USING AN ANALOG TO DIGITAL SIGNAL CONVERTER Inventor, John C. Olson, Abstract, A digital to analog signal converter apparatus for converting digital signals to analog signal outputs. The converter apparatus includes a microprocessor a low pass, filter portion for converting a digital output signal from the microprocessor to an analog output signal and an analog to, digital converter portion for sampling and converting the analog output signal to provide a digital input to the microprocessor, permitting control of the analog output signal.

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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.
FiledJune 7, 1989
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1301344 C
Classification (IPC)H03M1/00 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJune 7, 1989Patent grantedMay 19, 1992Term endedMay 19, 2009

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