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Expired Canadian patentCanada

Nerve fiber stimulation using plural equally active electrodes

CA 1313539 C · Owner: Compex Technologies, Inc. · Inventors: Thomson, Thomas H.

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Abstract From the Canadian patent

Abstract of the Disclosure, Nerve fiber stimulation is disclosed to substantially increase the activity of the then selected nerve fibers, with optimization being achieved through utilization of electrical pulses that are caused to occur in a predetermined pattern with respect to polarity, spacing, frequency and duration so as to interact with the electro-neurophysiological characteristics of the particular nerve fibers then to be electrically stimulated. Bi-phased pulse pairs are repeatedly generated and applied to the nerve fibers to be stimulated through plural active electrodes with the first pulse of each applied pulse pair being a positive polarity pulse causing the nerve to be set …

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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 February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 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.
FiledJanuary 25, 1988
GrantedFebruary 9, 1993
Term endedFebruary 9, 2010
Patent numberCA 1313539 C
Classification (IPC)A61N1/36

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 25, 1988Patent grantedFeb 9, 1993Term endedFeb 9, 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.