ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,295, issued on April 15, was assigned to KWANTEX RESEARCH INC. (Tainan, Taiwan).
"Fastener, driver bit and punch tool" was invented by Chao-Wei Lin (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fastener includes a screw head and a screw shank. The screw head has a top surface and an inner surrounding surface. The inner surrounding surface has six curved portions and six driven portions disposed in an alternating arrangement. Each of the driven portions has a curved section connected to one of two adjacent curved portions and having a direction of curvature opposite to that of the one of the two adjacent curved portions, a straight ...