Method and apparatus for extracting keywords from text
CA 1318403 C · Owner: Next, Inc. · Inventors: Hawley, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A method and apparatus for extracting keywords automatically from files, which can be useful in retrieving files in large file systems are, provided. The frequency of occurrence of each word in a file, as compared to the frequency of occurrence of other words in the file, is calculated. If the calculated frequency exceeds by some predetermined threshold the frequency of occurrence of that same word in a reference domain appropriate to the file then the word is selected as a keyword for that file.
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
- Granted May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.