ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,972, issued on April 29, was assigned to SHIMANO INC. (Sakai, Japan).
"Sprocket support body and bicycle rear hub assembly" was invented by Tomonari Oka (Sakai, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sprocket support body is rotatably mounted on a hub axle of a bicycle rear hub assembly. The sprocket support body comprises at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface. The at least ten external spline teeth has an external-spline major diameter equal to or sma...