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Expired Canadian patentCanada

Knowledge representation in a network database system

CA 2202867 C · Owner: Noyes, Dallas B. · Inventors: Noyes, Dallas B.

CIPO record

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Abstract From the Canadian patent

A system for knowledge representation in a computer together with the ability , to recognize store and use patterns, together withthe ability to derive documents or other human interpretable displays in a plurality of different formats or views. The knowledge representation system defines a database engine constituting a method for modeling knowledge as a network of concepts and a plurality of relationships between the concepts comprising the network.Each concept is represented as a record in the database which is identified by a unique record reference number. Concept records include Attribute records (73b), Component records (73c) and Project records (73d). Concept records further …

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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 August 8, 1995 and granted September 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 8, 1995
GrantedSeptember 26, 2000
Term endedAugust 8, 2015
Patent numberCA 2202867 C
Classification (IPC)—

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedAug 8, 1995Patent grantedSep 26, 2000Term endedAug 8, 2015

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