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Expired Canadian patentCanada

Biological tissue stimulator with time-shared logic driving output timing and high voltage step-up circuit

CA 1321240 C · Owner: Dieken, Alan Paul · Inventors: Dufresne, Joel Rivard; Dieken, Alan Paul

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

Abstract of the Disclosure A biological tissue stimulator (10) having a time-shared logic element (16) alternately supplying switching signals (40) to a step-up voltage circuit (20) powered from a low-voltage power source (26) and supplying a plurality of amplitude timing signals (58, 60) to an output circuit (18) utilizing the high-voltage output (22) from the step-up voltage circuit (20). A high-voltage storage device (44) is utilized to store the voltage generated in the step-up voltage circuit (20) until it can be utilized by the output circuit (18).

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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 August 10, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 10, 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.
FiledApril 14, 1988
GrantedAugust 10, 1993
Term endedAugust 10, 2010
Patent numberCA 1321240 C
Classification (IPC)A61N1/32 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 14, 1988Patent grantedAug 10, 1993Term endedAug 10, 2010

Sources & verification

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