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1975-03-10 |
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1986-04-22 |
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Torque-speed control system for asynchronous D.C. brushless motor
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General Electric Company |
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Victor Company Of Japan, Ltd. |
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1993-05-18 |
Toshiba Corp |
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1991-11-20 |
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Makita Corp |
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1994-11-29 |
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Tachometer for determining the speed of a motor
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