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Expired Canadian patentCanada

Power supply systems for use in radio communication system

CA 1198168 A · Owner: Nippon Electric Co. Ltd. · Inventors: Ichihara, Masaki

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Abstract From the Canadian patent

In a power supply system for use in a radio communication system comprising a base station for transmitting and receiving radio signals one or more, repeater stations for repeating the radio signals and a, terminal station communicating with the base station through the repeating stations, the base station comprises means for transmitting synchronizing signal pulses at a predetermined period for effecting a battery saving type power supply. Each of the repeater station and terminal station comprises means, responsive to successive reception of a predetermined number of the synchronizing signal pulses, for effecting intermittent battery saving at a period substantially equal to the period of …

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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 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 1, 1983
GrantedDecember 17, 1985
Term endedDecember 17, 2002
Patent numberCA 1198168 A
Classification (IPC)H04B7/15

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 1, 1983Patent grantedDec 17, 1985Term endedDec 17, 2002

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