Compressed representation of a data base that permits ad hoc querying
CA 2233733 C · Owner: Jagadish, Hosagrahar Visvesvaraya · Inventors: Korn, Philip Russell; Jagadish, Hosagrahar Visvesvaraya; Faloutsos, Christos N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for compressing a data base that permits queries on the compressed representation of the data base. Another feature is that an approximation of the values of the data base are derivable directly from the compressed representation of the data base. Yet another feature is correction of poor approximations of the reconstructed data. Still another feature is the capability of performing aggregate queries of the compressed representation of the data base.
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 March 31, 1998 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2020.
- 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.