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Expired Canadian patentCanada

Power amplifier

CA 1265216 C · Owner: Nojima, Toshio · Inventors: Nishiki, Sadayuki; Nojima, Toshio

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

An input signal is divided equally by a divider and the equally divided outputs are applied to first and second amplifying means, respectively. A filter means which rejects the fundamental wave component of the input signal but passes therethrough its harmonic component is, connected between the first and second amplifying means. The outputs of the first and second amplifying means are respectively connected to first and second select circuits which select the fundamental wave components of the input signal. The outputs from the first and second circuits are combined in phase with each other, by a combiner into, a composite signal.

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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 21, 1987
GrantedJanuary 30, 1990
Term endedJanuary 30, 2007
Patent numberCA 1265216 C
Classification (IPC)H03F3/60 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedJuly 21, 1987Patent grantedJan 30, 1990Term endedJan 30, 2007

Sources & verification

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