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Expired Canadian patentCanada

Shared memory controller arrangement

CA 1307352 C · Owner: Honeywell Information Systems Inc. · Inventors: Lemay, Richard A.; Wallace, David A.; Izbicki, Kenneth J.

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Abstract From the Canadian patent

A shared memory controller arrangement is disclosed wherein a number of local memories are primarily dedicated to the shared use of a number of local processors to increase the efficiency of use of both the processors and memories. A controller is associated with each local memory to control connection of any one of the local processors to its associated local memory. A local processor can also be connected via a controller and an adapter circuit connected to the controller to a system bus to obtain access to circuits connected thereto. In addition a, system processor connected to the system bus may also be connected to any particular one of the local memories via its associated controller …

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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 September 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 26, 1988
GrantedSeptember 8, 1992
Term endedSeptember 8, 2009
Patent numberCA 1307352 C
Classification (IPC)G06F13/16 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 26, 1988Patent grantedSep 8, 1992Term endedSep 8, 2009

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