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Expired Canadian patentCanada

Identifying critical features in ordered scale space

CA 2509580 C · Owner: Knight, William · Inventors: Knight, William

CIPO record

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Abstract From the Canadian patent

A system and method for identifying critical features in an ordered scale space within a , multi-dimensional feature space is described. Features are extracted from a plurality of data , collections. Each data collection is characterized by a collection of features semantically-related , by a grammar. Each feature is normalized and frequencies of occurrence and cooccurrences for , the feature for each of the data collections is determined. The occurrence frequencies and the co-occurrence , frequencies for each of the features are mapped into a set of patterns of occurrence , frequencies and a set of patterns of co-occurrence frequencies. The pattern for each data , collection is …

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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 11, 2003 and granted December 9, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2025.
  • 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 11, 2003
GrantedDecember 9, 2014
Term endedDecember 11, 2023
Patent numberCA 2509580 C
Classification (IPC)G06F16/31

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedDec 11, 2003Patent grantedDec 9, 2014Term endedDec 11, 2023

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