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Expired Canadian patentCanada

Tightly coupled multiprocessor instruction synchronization

CA 1321655 C · Owner: Kahle, James A. · Inventors: Nguyenphu, Myhong; Ray, David S.; Grohoski, Gregory F.

CIPO record

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Abstract From the Canadian patent

Abstract, A data processing system including an instruction storage buffer for storing a sequence of instructions requiring an operation by at least two processors. The two processors are provided that execute instructions from the instruction storage buffer. An instruction dispatch circuit is provided that dispatches the instructions to the processors. At least one processor includes the capability to execute dispatched instructions before the execution of a preceding instruction in the instruction sequence by another processor. Also at least one processor includes the capability to delay execution of an interruptable instruction until the instruction can be executed in its appropriate …

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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 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 2010.
  • 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 18, 1989
GrantedAugust 24, 1993
Term endedAugust 24, 2010
Patent numberCA 1321655 C
Classification (IPC)G06F9/38 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 18, 1989Patent grantedAug 24, 1993Term endedAug 24, 2010

Sources & verification

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