Text index registration and retrieval method
CA 2218270 C · Owner: Hatakeyama, Atsushi · Inventors: Hatakeyama, Atsushi; Kawamura, Nobuo; Torii, Shunichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A text data registering and retrieving method capable of improving the transaction processing performance is provided. The document number of a document for which deletion or replacement has been newly requested is registered in an updated document number list the text, data of the document for which insertion or replacement has been newly requested is registered in an update text buffer, the text data stored temporarily in the update text buffer is registered in a plural-character occurrence file defining a text index in a character component file merge step, the data registered in the plural-character occurrence file is retrieved for query terms, the text data stored in the update text …
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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 10, 1997 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2019.
- 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.