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Expired Canadian patentCanada

Method of assigning a radio channel to a calling mobile body of mobile communication system and radio channel assigning system therefor

CA 1083226 A · Owner: Nippon Telegraph And Telephone Public Corporation · Inventors: Yoshikawa, Noriaki; Komura, Mitsuru; Ito, Sadao

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Abstract From the Canadian patent

Specification, Title of the Invention, A Method of Assigning a Radio Channel to a Calling Mobile Body of Mobile Communication System and Radio Channel Assigning System Therefor Abstract of the Disclosure, The service area of the system is divided into a plurality of overlapping radio zones and a mobile base station is installed in each zone. The mobile base stations are assigned with a common control channel and each station is assigned with a plurality of speech channels which are commonly controlled by the control channel. Where a mobile body originates, the intensities of signals received by respective stations which have resulted from a signal transmitted by the mobile body are compared …

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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 August 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 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.
FiledJanuary 11, 1977
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083226 A
Classification (IPC)H04W72/08 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJan 11, 1977Patent grantedAug 5, 1980Term endedAug 5, 1997

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