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Expired Canadian patentCanada

Using a category to analyze an image showing a graphical representation

CA 2118344 C · Owner: Rao, Satyajit · Inventors: Rao, Satyajit; Mahoney, James V.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Image data define an image that shows an input graphical representation whose configuration represents information. The image can show a sketch for example. The image data are used to obtain category data indicating a category of graphical representations. For example the category data could, indicate any of X-Y graph directed graph, undirected graph, bar graph pie, chart, line graph, scatter plot, circuit diagram flow chart, Venn diagram, state-transition diagram tree, table, matrix, or array. The category data could also indicate a specific category within a generic category such as bar graph or pie chart. The category data can be obtained by determining whether the graphical …

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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 October 18, 1994 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 18, 1994
GrantedSeptember 7, 1999
Term endedOctober 18, 2014
Patent numberCA 2118344 C
Classification (IPC)G06F3/14 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedOct 18, 1994Patent grantedSep 7, 1999Term endedOct 18, 2014

Sources & verification

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