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Expired Canadian patentCanada

Demand pacer having reduced recovery time

CA 1098590 A · Owner: Stimtech, Inc. · Inventors: Allen, Kenneth R.; Digby, Dennis; Coombes, Alan

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Abstract From the Canadian patent

Demand Pacer Having Reduced, Recovery Time In a demand pacer, an input amplifier senses stimulating pulses and natural heart beat signals and responsively, thereto establishes control of a subsequent stimulating pulse. Charge accumulation on an output capacitor governs recovery time after each generated stimulating pulse. Respective first and second flip-flops, responsive to the input amplifier and the demand pacing logic, establishes a reduced recovery time after each generated pulse, wherein charge accumulated on the output capacitor is dissipated.

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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 17, 1978
GrantedMarch 31, 1981
Term endedMarch 31, 1998
Patent numberCA 1098590 A
Classification (IPC)A61N1/36 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 17, 1978Patent grantedMarch 31, 1981Term endedMarch 31, 1998

Sources & verification

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