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Expired Canadian patentCanada

System for aligning whip antenna matching base units

CA 1091802 A · Owner: United States (Government Of The) As Represented By The Secretary Of The Army · Inventors: Cunningham, Peter E.

CIPO record

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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 system for setting the admittances of matching base units for use with whip antennas wherein the matching base unit is placed across a cavity resonator which is first calibrated in accordance with the admittances of a standard matching base unit through a range of prescribed frequencies and thereafter aligning the admittances of production model matching base units over the same range of frequencies in accordance with the previously calibrated or aligned cavity resonator.

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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 December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 8, 1978
GrantedDecember 16, 1980
Term endedDecember 16, 1997
Patent numberCA 1091802 A
Classification (IPC)G01R27/04

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 8, 1978Patent grantedDec 16, 1980Term endedDec 16, 1997

Sources & verification

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