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Expired Canadian patentCanada

Extended range phase detector

CA 1300697 C · Owner: General Signal Corporation · Inventors: Wolaver, Dan H.

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

A linear three-state phase detector capable of accurately responding to simultaneous input signals has its linear range extended by uniquely sensing cycle slip and stepping a binary up-down counter. The cycle slip detector is capable of handling simultaneous inputs by determining that a resulting change of the three-state phase detector output occurs after a predetermined time after an input 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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 21, 1989
GrantedMay 12, 1992
Term endedMay 12, 2009
Patent numberCA 1300697 C
Classification (IPC)H03K5/26 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedSep 21, 1989Patent grantedMay 12, 1992Term endedMay 12, 2009

Sources & verification

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