The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2015
Filed:
Aug. 30, 2012
Kazuhiko Isogawa, Kobe, JP;
Yoshiko Matsuyama, Kobe, JP;
Kosuke Tachibana, Kobe, JP;
Dunlop Sports Co. Ltd., Kobe, JP;
Abstract
A golf ballincludes a core, a mid layer, a reinforcing layer, and a cover. A hardness Hm of the mid layeris greater than a hardness Hc of the cover. A difference (Hm−Hc) is greater than 28. A hardness Hs2 at a surface of a sphere consisting of the coreand the mid layeris greater than a hardness Hs3 at a surface of the golf ball. A difference (Hs2−Hs3) is less than 5. A thickness Tm of the mid layeris larger than a thickness Tc of the cover. A ratio (Tm/Tc) is greater than 3.0 and less than 5.0. A diameter of the coreis equal to or greater than 38.2 mm. The hardness Hc of the coveris equal to or less than 37.