ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,680, issued on Nov. 4, was assigned to NTN Corp. (Osaka, Japan).

"Tripod type constant velocity universal joint" was invented by Taku Itagaki (Shizuoka, Japan), Tatsuro Sugiyama (Shizuoka, Japan) and Minoru Ishijima (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tripod type constant velocity universal joint includes an outer joint member having three track grooves each including roller guide surfaces opposing each other in a circumferential direction of each of the track grooves, a tripod member including three leg shafts, and roller units each including a roller and an inner ring to support the roller. An outer peripheral surface ...