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Expired Canadian patentCanada

Computer system comprising a data, address and control signal bus which comprises a left bus and a right bus

CA 1193742 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Visser, Jeroen M.; Zandveld, Frederik

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Abstract From the Canadian patent

Computer system comprising a data address and control, signal bus which comprises a left bus and a right bus. A computer system comprises a bus for data address and control signals which is divided into a left bus (36) and a right bus (38) by a first gating device (34). The gating device has an open state which is character-wise activated by a right bus request transported on the left bus. Furthermore, the gating device conducts start signals from a processor station (28) connected to the left bus and interrupt signals from a peripheral apparatus connected to the right bus. In the closed state of the gating device, bulk data transport is possible on the right bus without interfering with …

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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.
FiledMay 19, 1983
GrantedSeptember 17, 1985
Term endedSeptember 17, 2002
Patent numberCA 1193742 A
Classification (IPC)G06F13/42 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMay 19, 1983Patent grantedSep 17, 1985Term endedSep 17, 2002

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