Arithmetic circuit
CA 2071255 A1 · Owner: Nec Corporation · Inventors: Suzuki, Kazumasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carry propagation circuit generating a block carry propagation function P as a signal at an intermediate junction of a carry lookahead circuit on, the basis of input two numbers A and B and a carry, generation circuit for generating a block carry generation function G on the basis of the two numbers A and B, are provided. When a carry input is O a carry co, is the same value to the block carry generation function G. On the other hand, when the carry input is 1 the, carry C1 is an OR of the block carry generation function G and the block carry propagation function P which can, be obtained by an OR circuit. Two sums S0 and S1 are derived from two carries and an exclusive OR of two numbers A …
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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 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.