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:
Sep. 12, 2017
Filed:
May. 17, 2016
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Takashi Nakano, Kobe, JP;
DUNLOP SPORTS CO. LTD., Kobe-shi, Hyogo, JP;
Abstract
A golf clubincludes a shafthaving a weight of 50 g or less. The shafthas a ratio of a center of gravity of 0.54 or greater. Respective EI values measured at intervals of 100 mm from a point 130 mm distant from a tip end Tp are defined as Eto E. A first region, a second region, and a third region are defined by boundaries at respective points having distances of 230 mm and 830 mm from the tip end Tp. In a graph on which the EI values are plotted, gradients of approximate straight lines in the first region, the second region, and the third region are defined as M, M, and M, respectively. Mto M, E/E, and E/Eare fall within respective specified scopes. Mis greater than M