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Expired Canadian patentCanada

Diversity receiver

CA 1281079 C · Owner: Nec Corporation · Inventors: Hashimoto, Kazuya

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 diversity receiver includes first and second receivers, a first switch, a comparator a second switch, and a controller. The first and second receiver have receiver antennas and generate demodulated signals and electric field detection outputs in accordance with received electric fields, respectively. The first switch performs switching between the demodulated signals from the first and second receivers in accordance with an output switching control signal and outputs a selected demodulated signal. The comparator compares the electric field detection outputs from the first and second receivers respectively, and supplies the output switching control signal to the first switch. The second …

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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 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 22, 1986
GrantedMarch 5, 1991
Term endedMarch 5, 2008
Patent numberCA 1281079 C
Classification (IPC)H04B1/16 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 22, 1986Patent grantedMarch 5, 1991Term endedMarch 5, 2008

Sources & verification

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