Associated Electrical Industries Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5221709 Sealing composition and a mineral insulated electric cable termination employing such compositionExpiredOct 08, 91Jun 22, 93[C08L, C08K]
4727229 Interrupter isolatorExpiredFeb 03, 86Feb 23, 88[H01H]
4689735 Power supply for single-phase traction systemExpiredFeb 06, 86Aug 25, 87[H02M]
4681988 Switch selector mechanismExpiredJan 16, 86Jul 21, 87[H01H]
4672284 Permanent split-phase capacitor induction motorExpiredOct 08, 85Jun 09, 87[H02P]
4670625 Electrical insulating bushing with a weather-resistant sheathExpiredJul 16, 86Jun 02, 87[H01B]
4628245 Multipolar excitation systemsExpiredFeb 13, 85Dec 09, 86[H02P]
4626777 D.C. current transformer circuitsExpiredMar 19, 84Dec 02, 86[G01R]
4558405 Multi-loop control system for an ac/dc converter employing mode switchingExpiredJan 31, 84Dec 10, 85[H02P]
4554623 Firing-angle control in invertersExpiredFeb 09, 84Nov 19, 85[H02M]
4520303 Induction motorsExpiredFeb 15, 84May 28, 85[H02P]
4512827 Method of manufacturing mineral insulated electric cable and like elementsExpiredAug 20, 82Apr 23, 85[H01B, H01C]
4503380 Static reactive compensatorExpiredFeb 25, 83Mar 05, 85[G05F]
4450388 Dynamic braking of direct current motorsExpiredOct 22, 82May 22, 84[H02P]
4408378 Apparatus for forming a filament coil of figure of eight conformationExpiredMay 21, 81Oct 11, 83[B65H]
4315202 Synchronous motorsExpiredApr 08, 80Feb 09, 82[H02P]
4313247 Apparatus for the manufacture of mineral insulated cablesExpiredJan 30, 80Feb 02, 82[A05B]

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