KUMAGAYA SEIMITSU CO., LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6002188 Motor bearing arrangement and electric motor using the sameExpiredMay 14, 98Dec 14, 99[H02K]
4833355 Motor with armature teeth and field magnetExpiredJun 16, 88May 23, 89[H02K]
4782259 Frequency generator and motor with the sameExpiredOct 28, 85Nov 01, 88[H02K]
4755701 Brushless motor having a frequency signal generator and a pulse signal generatorExpiredMay 08, 87Jul 05, 88[H02K]
4700098 D.C. motors with unequal pole spacingExpiredDec 27, 85Oct 13, 87[H02K]
4668884 Brushless motorExpiredApr 24, 85May 26, 87[H02K]

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