Power transmission and distribution digital protection system
CA 2010571 C · Owner: Chiba, Tomio · Inventors: Mori, Shigeru; Kido, Mitsuyasu; Yamanaka, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power signal processing system high in expandability and versatility is disclosed in which a, signal representing the conditions of a power system is taken in and subjected to digital computation processing and a signal is produced for protecting or controlling the power system on the basis of the computation result. The power signal processing system comprises a plurality of processing units for executing a series of processing from signal input to signal output based on the computation result in divided fashion in accordance with the processing functions. A system control unit has a function of controlling the units to assure sequential data transfer therebetween according to the …
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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 February 21, 1990 and granted April 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2012.
- 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.