ABB Traction, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5925816 Apparatus for testing watertightness of a railcarExpiredDec 19, 97Jul 20, 99[G01M]
5780722 Method and apparatus for testing watertightness of a railcarExpiredSep 11, 97Jul 14, 98[G01M]
4435664 Magnetic interpole apparatus for improving commutation characteristics of a dynamoelectric machineExpiredApr 13, 81Mar 06, 84[H02K]
4414631 Brake control systemExpiredApr 22, 81Nov 08, 83[B60T]
4357655 Three-phase inverterExpiredMay 12, 81Nov 02, 82[H02M]
4228739 Motorized railway truck articulated shaft housingExpiredJul 01, 77Oct 21, 80[B61C, F16C, F16F]

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