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Expired Canadian patentCanada

Data integrity checking with fault tolerance

CA 1307850 C · Owner: Tandem Computers Incorporated · Inventors: Chan, Wing M.

CIPO record

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Abstract From the Canadian patent

Fault tolerant apparatus for generating error correcting code and, simultaneous therewith checking, the correctness of the generation for blocks of data, with which the error correcting code is associated and transmitted to a storage medium. The apparatus includes a pair of programmable control devices configured to selectively operate in one of two modes: A first mode in which data being transferred to the storage medium is monitored for generation of an error correcting code to be associated and stored with each data block and a, second mode in which the data being transferred is monitored for detecting errors that may be contained in the data. During data transmissions to the storage …

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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 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
  • 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 28, 1988
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307850 C
Classification (IPC)G06F11/10 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 28, 1988Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

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