U.S. federal trademark · Serial No. 73014249 · Reg. No. 1004731
SOLID STATE ELECTRICAL CONTROL OF THE SPEED OF A WOUND ROTOR MOTOR EMPLOYING THE PRINCIPLES OF REGENERATION OF POWER TO THE AC SUPPLY THROUGH RECTIFICATION AND INVERSION OF THE SECONDARY CURRENT OF THE WOUND ROTOR MOTOR TO MINIMIZE ELECTRICAL LOSSES AS THE MOTOR IS SPEED CONTROLLED BELOW SYNCHRONOUS SPEED
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