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All Patents in class 361/237
Patents 1 - 3 of 3
First set of recordsLast set of records
291,650Jan. 08, 1884C.J. Van DepoeleCurrent Regulator for Electric Motorsmotor regulators
313,546Mar. 10, 1885F.J. SpragueElectric Dynamic MotorDC motors
531,790Jan. 01, 1895R. EickemeyerMethod of operating or controlling electric motors or dynamos
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