ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,781, issued on Nov. 18, was assigned to SUMITOMO RUBBER INDUSTRIES LTD. (Kobe, Japan).
"Heavy duty tire" was invented by Takashi Sugiura (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heavy duty tire can have a tread portion that includes a plurality of circumferential grooves that zigzag, a plurality of lateral grooves connecting between zigzag vertexes of the circumferential grooves, and a plurality of hexagonal blocks formed by the circumferential grooves and the lateral grooves. A groove depth of the circumferential groove can be 21 mm or more. Each of the hexagonal blocks can include a three-dimensional sipe extending across the ...