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:
May. 21, 2013
Filed:
Apr. 23, 2010
Tomio Kumamoto, Kobe, JP;
Tomio Kumamoto, Kobe, JP;
SRI Sports Limited, Kobe-Shi, JP;
Abstract
A headhas a face linehaving a depth of D1 (mm). In a section line of a surface of the face line, a boundary between a land area LA and the face lineis defined as a point Pa; a point of which a depth is [D¼] (mm) is defined as a point Pb; a point of which a depth is [D½] (mm) is defined as a point Pc; a point of which a depth is [(D1)×(¾)] (mm) is defined as a point Pd; a radius of a circle CLpassing through three points of the point Pa, the point Pb, and the point Pc is defined as R(mm); a straight line passing through the point Pc and the point Pd is defined as a straight line Lcd; a straight line perpendicular to the land area LA is defined as a straight line Lp; and an angle between the straight line Lcd and the straight line Lp is defined as θm. At that time, the radius Ris 0.01 (mm) or greater and 0.10 (mm) or less, and the angle θm is 40 degrees or greater and 70 degrees or less.