Device for evaluating logarithms
CA 2085116 A1 · Owner: Lindsley, Brett Louis · Inventors: Lindsley, Brett Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A logarithm of an input value is computed utilizing a function generator (106) to generate a first logarithm of an approximation value (102) of the input value, scaled to a natural logarithm value where the first logarithm is not a natural base logarithm and , then combined (110) with a correction value obtaining a natural , base logarithm of the input value. An error value related to the, input value and the approximation value is generated (104) and , is utilized in a specified power series to determine the correction value (108). The natural base logarithm obtained is scaled by a natural base logarithm of a desired base of a desired output logarithm, thereby determining the desired …
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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 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 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.