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Expired Canadian patentCanada

System for controlling transfer of commands between processors

CA 1231458 A · Owner: Fujitsu Limited · Inventors: Inoue, Aiichiro; Oinaga, Yuji; Onishi, Katsumi

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Abstract From the Canadian patent

A system for controlling transfer of commands between processors of a multiprocessor system including, a single control unit connected to all the processors by separate information transfer line. The control unit selects the processor generating a command transfer request signal in a predetermined priority order and receives the processor address from the selected processor. The receiving processor and predetermined transfer information are determined in accordance with the selected processor, the processor address and the, processor status information determined by the processor address. The predetermined transfer information is transferred to the receiving processor via an information …

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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 January 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 17, 1985
GrantedJanuary 12, 1988
Term endedJanuary 12, 2005
Patent numberCA 1231458 A
Classification (IPC)G06F13/42 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 17, 1985Patent grantedJan 12, 1988Term endedJan 12, 2005

Sources & verification

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