Optimization of information bases
CA 2071032 C · Owner: Ncr Corporation · Inventors: Selman, Bart; Kautz, Henry Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique for increasing the efficiency of a system such as an artificial intelligence system or a data base system in which a query is applied to a set of formulas. The technique creates an approximation of the set of formulas which iscomputationally more tractable than the original set. The original set is used to answer the query only if the approximation fails to provide the answer. The approximation is made by a compilation process which provides a series of ever-closer approximations. A given query is answered using the currently-closest approximation. The approximation may consist of a first set of formulas which is an upper bound (i.e. implied by) of the original set and a second …
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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 June 11, 1992 and granted January 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2014.
- 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.