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Expired Canadian patentCanada

Secure commodity bus

CA 1331212 C · Owner: Honeywell Bull Inc. · Inventors: Webster, Raymond J. Jr.; Dichiara, Joseph G.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A secure system includes a secure central processor unit, an input/output emulator, a number of commodity controller boards and a number of commodity memory boards. Apparatus in the secure CPU and firmware in the I/O emulator maintain the security of the overall system.

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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 August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 24, 1988
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331212 C
Classification (IPC)G06F13/10

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 24, 1988Patent grantedAug 2, 1994Term endedAug 2, 2011

Sources & verification

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