ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,745, issued on May 20, was assigned to BRIDGESTONE SPORTS Co. LTD. (Tokyo).
"Multi-piece solid golf ball" was invented by Hideo Watanabe (Saitamaken, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multi-piece solid golf ball includes a core, an intermediate layer, and a cover, in which the core is formed of a rubber composition, the intermediate layer and the cover are formed of a resin composition, and a specific gravity of the intermediate layer is set to at least 1.05, or a relationship among a core surface hardness, a surface hardness of an intermediate layer-encased sphere, and a ball surface hardness satisfies the following condition:b...