ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,015, issued on Aug. 12, was assigned to Yi-Fu Chen (Taichung, Taiwan).
"Telescopic wrench" was invented by Yi-Fu Chen (Taichung, Taiwan) and He-Qian Chen (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A telescopic wrench includes an outer tube, an outer sleeve, and an inner rod. The first hole of the outer sleeve ring is fitted onto the outer tube, and the second hole of the outer sleeve provides peripheral contact with the rod section of the inner rod. The outer sleeve forms an external auxiliary fitting structure with the inner rod and outer tube. The telescopic wrench provides an improvement over known structures that are prone ...