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:
Aug. 16, 2005
Filed:
Dec. 23, 2003
Yoshinori Sano, Kobe, JP;
Yoshinori Sano, Kobe, JP;
SRI Sports Limited, Kobe, JP;
Abstract
A method of manufacturing a golf club head comprises: making a billet of a titanium alloy Ti-6Al-4V by machining an ingot of the titanium alloy; forging the billet into a face plate within a temperature range of from (the beta transformation temperature −150 degrees C.) to (the beta transformation temperature −20 degrees C.); and jointing the face plate and a head main body, whereby the golf club head comprise a face portion for hitting a ball, at least part of which is made of an alpha and beta type titanium alloy Ti-6Al-4V including alpha phase crystal structure whose average grain size is not less than 20 micrometers but less than 70 micrometers.