ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,527,995, issued on Jan. 20, was assigned to BRIDGESTONE SPORTS Co. LTD. (Tokyo).
"Golf ball" was invented by Hideo Watanabe (Saitamaken, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a golf ball having a core and a cover, the cover is formed primarily of polyurethane, the ball has a diameter of at least 42.8 mm and a weight of not more than 44.9 g and, in an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for...