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Expired Canadian patentCanada

Method and apparatus for arbitration and serialization in a multiprocessor system

CA 1286416 C · Owner: Begley, Michael J. · Inventors: Magee, Kristin; Vahidsafa, Ali; Begley, Michael J.

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Abstract From the Canadian patent

A method and apparatus for providing arbitration between and serialization of plural processors in a multiprocessor system comprising in, each processor, a delay network, a priority circuit a, REQUEST generator, an ORDER generator a serialization, program, an ACK generator and an ACK receiver. In operation, the delay network insures that simultaneously generated REQUESTS received from plural processors are received by the priority circuit at the same time. A processor awarded priority issues an ORDER to the other processors and thereafter drops its REQUEST to allow an award of priority to another processor. An ACK is received by the ORDER issuing processor from each processor when it …

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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 July 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 1, 1987
GrantedJuly 16, 1991
Term endedJuly 16, 2008
Patent numberCA 1286416 C
Classification (IPC)G06F15/16 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedSep 1, 1987Patent grantedJuly 16, 1991Term endedJuly 16, 2008

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