ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,968, issued on March 18, was assigned to BRIDGESTONE Corp. (Tokyo).
"Pneumatic tire" was invented by Nobuyuki Ishihara (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pneumatic tire can suppress uneven wear of the tire and can improve traction performance on snow. Land portions (12A, 12B, 12C), between a pair of outermost side circumferential grooves (11d, 11d) on the outermost sides in the tire widthwise direction among a plurality of circumferential grooves (11a, 11b, 11c, 11d) extending in the tire circumferential direction, are divided into a plurality of blocks (14A, 14B, 14C) by widthwise grooves (13a, 13b, 13c). A pair of groove side...