ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,053, issued on June 23, was assigned to Sumitomo Riko Co. Ltd. (Aichi, Japan).
"Tubular vibration damping device" was invented by Kuninori Sato (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tubular vibration damping device includes an inner shaft member and an outer tubular member connected by a main rubber elastic body. A plurality of first identification protrusions protruding outward are formed apart in a circumferential direction on one axial end surface of the main rubber elastic body, and a plurality of second identification protrusions protruding outward are formed apart in the circumferential direction on another axial end s...