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Expired Canadian patentCanada

Out-of-cycle error correction apparatus

CA 1136282 A · Owner: Honeywell Information Systems Inc. · Inventors: Drobny, Edward M.; Suelflow, Robert E.

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

This relates to an apparatus and method for providing an accurate data group to the instruction buffer of a data processing system. The data group is simultaneously applied to the instruction buffer and to error correcting apparatus. After analysis of the data group in the error correcting apparatus the operation in progress is aborted if an error has been detected and the error is not correctable. If correctable the correct instruction data group is applied to the execution unit. If no error is tected in the data group utilization of the data group proceeds uninterrupted. Two three state busses are employed the first of which, is used to transmit memory data to the error detection 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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1979
GrantedNovember 23, 1982
Term endedNovember 23, 1999
Patent numberCA 1136282 A
Classification (IPC)G06F11/28 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedApril 30, 1979Patent grantedNov 23, 1982Term endedNov 23, 1999

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