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Expired Canadian patentCanada

Microprocessor architecture with integrated interrupts and cycle steals prioritized channel

CA 1103370 A · Owner: International Business Machines Corporation · Inventors: Marenin, George B.

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

Abstract, A computing system architecture includes a central processing unit having a channel, arithmetic and logic unit a plurality of working, registers, and control logic; a plurality of local storage registers; a main storage; an executable control store; one or more input/output devices; and a multiplexed cycle steal and interrupt request common poll bus. The storage and input/output devices communicate with and are controlled by the central processing unit over a looped or unidirectional, bus and control channel including a bus in a bus out, an address and, control bus and a plurality of control lines. Bus out is operated to address the executable control store and main storage and to …

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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 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 14, 1980
GrantedJune 16, 1981
Term endedJune 16, 1998
Patent numberCA 1103370 A
Classification (IPC)G06F9/04 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedAug 14, 1980Patent grantedJune 16, 1981Term endedJune 16, 1998

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