Data compression method
CA 1291829 C · Owner: Shimazaki, Yoshihito · Inventors: Sato, Takuro; Kawabe, Manabu; Shimazaki, Yoshihito
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of compressing text data including codewords of characters; input word each consisting of a series of codewords of one or more characters is extracted from the text data; a dictionary containing as entries, words made up of characters is provided; a codeword is stored in association with each word; occurrence counts of respective words are also stored; the dictionary is searched to find whether or not the input word matches any of the words; the codeword assigned to the word which the input word has been found to match is produced; the occurrence count of the word which the input word has been found to match is updated; and when the input word is not found to match any of the …
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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
- Granted November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2008.
- 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.