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Expired Canadian patentCanada

Power supplying apparatus

CA 1163321 A · Owner: Takematsu, Yoshiyuki · Inventors: Takematsu, Yoshiyuki

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

This invention concerns to a power supply arrangement which comprises, substantially a power, source circuit, a voltage converter circuit for converting a direct current voltage from the direct current power source circuit into an alternating current voltage and a rectifier circuit for rectifying the alternating current voltage to a high direct current voltage to be applied to a load. The voltage converter circuit includes an oscillating transformer and an oscillation switching element. The oscillating transformer is provided with only two windings, and these windings are effectively employed to activate the voltage converter circuit. - 26 -

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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 6, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2001.
  • 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 16, 1980
GrantedMarch 6, 1984
Term endedMarch 6, 2001
Patent numberCA 1163321 A
Classification (IPC)H02M3/32 +2 more

Timeline

Timeline From CIPO dates

1981198419871990199319961999Application filedApril 16, 1980Patent grantedMarch 6, 1984Term endedMarch 6, 2001

Sources & verification

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