ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,655, issued on April 22, was assigned to Guangdong Aoyun Technology Co. Ltd. (Huizhou, China).
"Stepless regulation fan" was invented by Xueping Zhu (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stepless regulation fan includes a fan main body and a control circuit board. The fan main body is equipped with first motors and fan blades connected to the first motors. The control circuit board includes an MCU, a stepless regulation element and a first driving circuit. The stepless regulation element and the first driving circuit are electrically connected to the MCU. The stepless regulation element is used for user operation, and the...