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Expired Canadian patentCanada

Knowledge base management system for an information reasoning apparatus

CA 2065473 C · Owner: Aie Research, Inc. · Inventors: Nishimura, Tadashi; Shimizu, Makoto; Osada, Yukinori

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Abstract From the Canadian patent

A knowledge base management system for an information reasoning apparatus includes a primary data storage a change, registration section, a data conversion section a knowledge, base section, a reasoning calculation section and a knowledge management section, the knowledge management section monitors accessing from said reasoning calculation section to said knowledge base section, collates an accessed place with information from said change registration section instructs, said conversion section to perform corresponding data conversion processing and to store the converted data in said knowledge base section if it detects accessing to a place in the knowledge base section corresponding to …

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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 April 7, 1992 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.
FiledApril 7, 1992
GrantedAugust 10, 1999
Term endedApril 7, 2012
Patent numberCA 2065473 C
Classification (IPC)G06F15/18 +1 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedApril 7, 1992Patent grantedAug 10, 1999Term endedApril 7, 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.