Line disturbance monitor and recorder system
CA 2105076 C · Owner: Dickens, Richard T. · Inventors: Dickens, Richard T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fault detection system (10) for monitoring at least one operating parameter of an AC power transmission line (12) includes current and/or voltage transducers (14) connected to the transmission line for providing an analog signal (16) representative of at least one time varying parameter of the AC power transmission. An analogto-digital (A/D) converter (18) converts the analog signal to digital sample words (22). A high sped DSP module (30) operates on the digital words and generates a trigger signal (33) when a disturbance is detected. A DMA component (32) implements a memory allocation protocol to sequentially address a plurality of memory zones (41) in a loop for sequential …
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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 26, 1992 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.