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Expired Canadian patentCanada

Method and apparatus for increasing co-channel utilization in a multi-station data communications network

CA 2031397 C · Owner: Motorola, Inc. · Inventors: Bruckert, Eugene J.

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 digital radio system having improved co-channel utilization is disclosed. A remote terminal receives a station identification from one of the fixed stations having an overlapping radio coverage area with another fixed station and retransmits this station identification with its message. A second fixed station receiving the remote terminal's transmission uses the station identification and the signal strength of the remote terminal to determine whether transmissions from other remote terminals should be inhibited. Depending upon the geographic proximity of the first fixed station to the second fixed station and the remote terminal's signal strength at the second fixed station, a 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

  • Filed December 3, 1990 and granted May 3, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2012.
  • 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 3, 1990
GrantedMay 3, 1994
Term endedDecember 3, 2010
Patent numberCA 2031397 C
Classification (IPC)H04B7/24 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedDec 3, 1990Patent grantedMay 3, 1994Term endedDec 3, 2010

Sources & verification

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