ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,140, issued on July 29.

"Forward and reverse rotation structure" was invented by Jen-Che Hung (Taichung, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A forward and reverse rotation structure contains: a gear box which includes a drive shaft coaxially connected with a rotatable wheel. The rotatable wheel includes at least one actuation sheet mounted on an inner wall and an outer wall of the rotatable wheel, at least one spring. The at least one actuation sheet of the inner wall of the rotatable wheel is mounted in a clockwise direction, and the at least one actuation sheet of the outer wall of the rotatable wheel is mounted in a counterclock...