ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,276, issued on April 15, was assigned to Sumitomo Rubber Industries Ltd. (Hyogo, Japan).
"Tyre" was invented by Koichi Nakajima (Kobe, Japan), Naoki Ishida (Kobe, Japan) and Masayuki Fujita (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tyre includes a tread portion including a tread surface which is provided with grooves. At least one of the grooves includes a widening-width portion at least partially. The widening-width portion includes a first groove portion extending inwardly in a tyre radial direction from the tread surface, and a second groove portion located inwardly in the tyre radial direction of the first groove portion and h...