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Expired Canadian patentCanada

Self-oscillating switching regulator having real-time current adjustmentcontrol

CA 1292276 C · Owner: Kutzavitch, Walter George · Inventors: Illuzzi, Vincent Anthony; Kutzavitch, Walter George; Rooney, Allen James, Iii

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 A self-oscillating switching regulator includes an inductor which is switched across the input or output depending, respectively, on whether a control voltage does not or does exceed a predetermined threshold. The control voltage is generated from a predetermined sum of the output voltage and a voltage dependent upon the inductor current when the inductor is connected across the input.

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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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 27, 1986
GrantedNovember 19, 1991
Term endedNovember 19, 2008
Patent numberCA 1292276 C
Classification (IPC)G05F1/10 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedFeb 27, 1986Patent grantedNov 19, 1991Term endedNov 19, 2008

Sources & verification

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