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. 15, 2007
Filed:
Feb. 14, 2006
Norihiko Nakahara, Hiratsuka, JP;
Shinji Yamamoto, Hiratsuka, JP;
Yoh Nishizawa, Hiratsuka, JP;
Tomoaki Mori, Hiratsuka, JP;
Norihiko Nakahara, Hiratsuka, JP;
Shinji Yamamoto, Hiratsuka, JP;
Yoh Nishizawa, Hiratsuka, JP;
Tomoaki Mori, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A hollow golf club head allowing to increase the repulsion and the degree of design freedom, while maintaining the durability. A hollow golf club head having a head body formed from a metal, wherein a hole is formed in the vicinity of the middle of a crown portion in the head body, the hole is closed with a cover member made of a material different from the head body, and the ratio (ρm/ρt) of the specific gravity ρm of the head body and the specific gravity ρf of the cover member is set equal or superior to 1.3.