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Expired Canadian patentCanada

Signal distinction circuit

CA 1314075 C · Owner: Tanno, Masaya · Inventors: Tanno, Masaya; Ishikawa, Tsutomu

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A signal distinction circuit comprises a clock signal generating circuit for generating a clock signal whose frequency is longer than that of a pulse signal corresponding to a discrimination signal applied to a counter as an actuating signal; and an arithmetic circuit for operating the pulse signal and the clock signal and, generating an output signal according to the presence or non-presence of the discrimination signal so as to forcibly drive a detecting circuit to which an output signal of the counter is applied, whereby the detecting circuit can be forcibly driven irrespective of the condition of the counter when the discrimination signal is not applied thereto.

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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 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 2, 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.
FiledJune 2, 1988
GrantedMarch 2, 1993
Term endedMarch 2, 2010
Patent numberCA 1314075 C
Classification (IPC)H04B1/16 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 2, 1988Patent grantedMarch 2, 1993Term endedMarch 2, 2010

Sources & verification

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