ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,898, issued on March 3.
"Stepless regulation fan" was invented by Xueping Zhu (Huizhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stepless regulation fan includes a fan main body, a main control circuit, a stepless regulation element electrically connected with the main control circuit and a first driving circuit. The fan main body is equipped with a first motor and fan blades connected to the first motor. The control circuit board integrates the main control circuit, a stepless regulation element electrically connected with the main control circuit and a first driving circuit. The stepless regulation element is configured for user oper...