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Expired Canadian patentCanada

Common file access system and a common file access method in a distributed memory type computer system

CA 2084376 C · Owner: Yoshimura, Kenji · Inventors: Yoshimura, Kenji; Sakamoto, Yoshinori; Kaku, Masaaki

CIPO record

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Abstract From the Canadian patent

A distributed memory type computer system comprises a common file system for managing file data being accessed by multiple distributed processing computers a, master computer for managing file data in the common file system and having file access to the common file system in accordance with a file access request and information on a file location provided by each distributed processing computer, at least one sub-master computer for providing each distributed processing computer with the information of a file location in the common file system in accordance with inquiry from each distributed processing computer about the file access location multiple distributed processing computers for …

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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

  • Filed December 2, 1992 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 2, 1992
GrantedMay 20, 1997
Term endedDecember 2, 2012
Patent numberCA 2084376 C
Classification (IPC)G06F12/02 +1 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedDec 2, 1992Patent grantedMay 20, 1997Term endedDec 2, 2012

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