Method and apparatus for determining the frequency of words in a document without document image decoding
CA 2077604 C · Owner: Withgott, M. Margaret · Inventors: Huttenlocher, Daniel P.; Rao, Ramana B.; Cass, Todd A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for determining word frequency from a document without first converting the document to character codes. The method includes morphological image processing to determine word unit characteristics for placement into equivalence classes utilizing non-content based information. Word shape representations are preferably determined and compared to define equivalent word units.
Read the whole patent
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 September 4, 1992 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2014.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.