Method and apparatus for the verification of data sequences
CA 2193227 C · Owner: Koninklijke Ptt Nederland N.V. · Inventors: Van Tilburg, Johan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for checking data sequences comprising a , protection step and a verification step with a control sequence (2) being , formed in the protection step on the basis of an identification sequence (1) which identification sequence comprises identification values (d) which identify data sequences which are to be protected and which control sequence , comprises control values (w) of which at least some have been formed on the basis of operation values, which operation values have been derived (F) from data of sequences which were identified by the said identification values and , with the data sequences being verified in the verification step, on the basis of …
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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 July 18, 1995 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2017.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.