ALEXANDRIA, Va., April 15 -- United States Patent no. 12,603,588, issued on April 14, was assigned to Intex Marketing Ltd. (Tortola, British Virgin Islands).
"Control circuit and method for DC motors" was invented by Zhi Xiong Huang (Fujian, China) and Ying Biao Zhang (Fujian, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A control circuit and method for DC motors is disclosed in the present application. The control circuit may comprise a voltage monitoring unit for monitoring the output voltage of the DC power supply, a switching circuit for controlling the operation of the DC motor, and a PWM signal output unit to output PWM signal for controlling the switching circuit. The PWM signal output unit ma...