US Patent Issued to SUMITOMO RUBBER INDUSTRIES on June 23 for "Golf ball" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,556, issued on June 23, was assigned to SUMITOMO RUBBER INDUSTRIES LTD. (Kobe, Japan).

"Golf ball" was invented by Daijiro Kojima (Kobe, Japan), Takahiro Shigemitsu (Kobe, Japan) and Takahiro Sajima (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A golf ball can include a core, a mid layer, and a cover. An amount P(Na) of a sodium ion-neutralized ionomer resin in abase resin of the cover can be not greater than 5 parts by mass. The golf ball can satisfy the following mathematical formulas (1) and (2): Fm / ( Hm * Tm ) - Fc / ( Hc * Tc ) less than= 3., and ( 1 ) Mc * Tc less than= 10., ( 2 ) where Hm: hardness (Shore D) of the mid laye...