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Expired Canadian patentCanada

Crossed-field discharge devices and couplers therefor and microwave circuits incorporating the same

CA 856435 A · Owner: General Electric Company · Inventors: James E. Staats

CIPO record

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

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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 17, 1970. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1987.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedNovember 17, 1970
Term endedNovember 17, 1987
Patent numberCA 856435 A
Classification (IPC)H03H7/12

Timeline

Timeline From CIPO dates

197119731975197719791981198319851987Patent grantedNov 17, 1970Term endedNov 17, 1987

Sources & verification

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