ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,467, issued on July 21.

"Power-assisted drive assembly" was invented by Yuk Chun Jon Chan (Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "A power-assisted drive assembly comprising a sprocket assembly, a drive spindle drivably connected to the sprocket assembly through a first one-way sprag clutch, a main housing rotatably supporting the drive spindle and defining a spindle axis, the main housing comprising a spindle supporting portion and a motor mounting portion, a motor mounted on the motor mounting portion and drivably connected to the sprocket assembly, the motor having a drive axis offset to the spindle axis, a gear mechanism drivabl...