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Expired Canadian patentCanada

Data flow control system

CA 1193746 A · Owner: Burroughs Corporation · Inventors: Chadra, David P.

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 data link processor, which is basically a peripheral-controller for interfacing a main host computer system to a peripheral terminal unit, forms part of an I/O subsystem in which a Base Module unit houses a plurality of such peripheral-controllers (data link processors). Each Base Module carries a Distribution Control circuit card which provides a communication interface between the main host computer and the peripheral-controller. Each base module also carries a maintenance test circuit card for diagnostic testing of the peripheral controllers, A data flow control circuit means controls direction of data transfer (a) between the host computer and …

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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 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 27, 1983
GrantedSeptember 17, 1985
Term endedSeptember 17, 2002
Patent numberCA 1193746 A
Classification (IPC)G06F3/12

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJuly 27, 1983Patent grantedSep 17, 1985Term endedSep 17, 2002

Sources & verification

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