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:
Dec. 26, 2017
Filed:
Sep. 17, 2015
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
DUNLOP SPORTS CO. LTD., Kobe-shi, Hyogo, JP;
Abstract
A golf ballhas a large number of dimpleson a surface thereof. The contours of the dimplesare non-circular. A standard deviation of areas of the dimplesis equal to or less than 1.7 mm. A ratio of a total area of the dimplesrelative to a surface area of a phantom sphere of the golf ballis equal to or greater than 80%. By comparting lines CS obtained by projecting sides of a regular dodecahedron, which is inscribed in the phantom sphere, onto the phantom sphere, a surface of the phantom sphere can be divided into 12 units Ut each of which meets the following mathematical formula (I):−2≦(/12)−≦2  (I),where Nt represents the total number of the dimplesand Nu represents the number of the dimpleson one unit.