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Expired Canadian patentCanada

Two-way mobile radio voice/data shared communications system

CA 1075771 A · Owner: Motorola · Inventors: Freeburg, Thomas A.; Joglekar, Manohar A.; Pajakowski, Lawrence R.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In control circuitry for a two-way mobile radio voice/data shared communications systems including a plurality of mobile stations with data and voice terminals a base, station, a dispatching station for voice and data a voice/data, processor interposed between the voice/data dispatching station and the base station, there is provided means for enabling transmission and reception of inbound and outbound voice and digital data signals between the base station and the mobile stations selectively to effect full-duplex voice/data shared communications.

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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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 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.
Filed—
GrantedApril 15, 1980
Term endedApril 15, 1997
Patent numberCA 1075771 A
Classification (IPC)H04B7/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedApril 15, 1980Term endedApril 15, 1997

Sources & verification

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