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Expired Canadian patentCanada

Intelligent input-output interface control unit for input-output subsystem

CA 1112324 A · Owner: Burroughs Corporation · Inventors: Millers, Donald A. Ii; Cook, Darwen J.

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

An intelligent Input-Output Interface Control unit des-, ignated as a Line control Processor which serves as a cont-, rol channel for data-transfers between a main data processing system and a plurality of different peripheral devices. The Line Control Processor operates on a standard communications and control discipline which makes the eccentricities of various peripheral units transparent to the Main System. Once initiated the Line Control Processor can execute the data-transfer instructions within the overall system so as to relieve the central processor of involvement in these tasks. Message-block length data buffer memories are provided within the Line Control Processor to permit …

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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 1112324 A
Classification (IPC)G06F11/00 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedSep 9, 1977Patent grantedNov 10, 1981Term endedNov 10, 1998

Sources & verification

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