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Expired Canadian patentCanada

Data transferring system

CA 1080319 A · Owner: Panafacom Limited · Inventors: Haida, Hirotoshi; Nitta, Atsushi

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

Herein disclosed is a data transferring system which provides a plurality of devices using a common bus said, devices send out a requesting signal to a requesting signal line for requesting a transfer of data and in said devices, a priority order is assigned to the transference of the data; and said system further provides a common control unit to said plurality of devices so as to control said bus, said control unit receives said request signal on said requesting signal line and then sends an acknowledging signal for said transfer of data, wherein each of said plurality of devices receives said acknowledging signal so that the device which sends out said requesting signal carries out the …

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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 June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 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—
GrantedJune 24, 1980
Term endedJune 24, 1997
Patent numberCA 1080319 A
Classification (IPC)G06F13/37

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJune 24, 1980Term endedJune 24, 1997

Sources & verification

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