Saskatchewan Power Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6453776 Separable loadbreak connector flashover inhibiting cuff venting toolExpiredMar 14, 01Sep 24, 02[B25B]
4521894 Overspeed/underspeed detectorExpiredApr 22, 82Jun 04, 85[G05B, G05D]
4471355 Method and apparatus for sensing current in high voltage conductorsExpiredMay 18, 81Sep 11, 84[H04B]
4363975 Direct current power supplyExpiredMay 18, 81Dec 14, 82[H02J]
4234782 Space heating using off-peak electric heat storageExpiredJan 19, 78Nov 18, 80[F24H, H05B]
4227038 Vibration isolator connectorExpiredFeb 17, 78Oct 07, 80[H02G]

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