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Expired Canadian patentCanada

Interface system providing interfaces to central processing unit and modular processor-controllers for an input-output subsystem

CA 1112326 A · Owner: Burroughs Corporation · Inventors: Millers, Donald A. Ii

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 of the Disclosure, A sub-interface system within an Input-Output Subsystem of a digital data processing system. The interface subsystem comprises a Main System Interface of a central processing unit working with the distribution-control means of a Base Module housing a group of Line Control Processors (individual Intelligent I/O Interface units) dedicated to a specific peripheral device. The Main System Interface is designated as an IOT, or Input-Output Translator, and translates input-output instructions into proper form for delivery to a particular intelligent interface unit which can execute the instructions. The IOT provides a data link identifier to identify each particular …

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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 November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 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.
FiledSeptember 9, 1977
GrantedNovember 10, 1981
Term endedNovember 10, 1998
Patent numberCA 1112326 A
Classification (IPC)H04L5/00 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedSep 9, 1977Patent grantedNov 10, 1981Term endedNov 10, 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.