Pattern matching circuit
CA 2044052 A1 · Owner: Rub, Bernardo · Inventors: Rub, Bernardo; Deroo, John E.; Frame, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a pattern matcher which (i) compares two or more multi-symbol data patterns, symbol-by-symbol and detects, any mis-matches, or errors (ii) combines into a relatively, small number of encoded bits information relating to the number of errors, and (iii) examines a single encoded bit to determine if the two patterns "match", i.e. if they differ by less than a predetermined number of symbols, or error threshold. The invention further includes a multi-bit output signal which may be used to determine, for patterns which match the actual, number of errors.
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 June 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2013.
- 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.