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Tatsuo Nakanishi, Toyohiko Tadokoro, Masaki Fujimura: Iron club head for golf. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, May 29, 1990: US04928972 (255 worldwide citation)

A fiber reinforcement, which can be of solid or hollow construction, and a synthetic resin back up are disposed in a recess provided on the side of the club head remote from the shooting surface. A mass can be adjustably imbedded in the synthetic resin backup so as to increase the inertial moment of ...


2
Noburoh Sumikawa, Masaki Fujimura: Golf club head. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, September 19, 1989: US04867458 (171 worldwide citation)

A golf club head including a sole, a back and a face, and a plurality of adjuster pins at least two of which are different in weight, degree of insertion and/or diameter, are inserted into the sole of a wood club head or the back of an iron club head at selected positions on an imaginary arcuate lin ...


3
Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro, Masaki Fujimura: Golf club head. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, December 5, 1989: US04884812 (165 worldwide citation)

In constructioln of a golf club head, presence of a light FRP plate located in a through opening in the face side region allows free weight assignment to other regions for ideal inertia moment adjustment. A metal layer may be provided on the FRP plate to produce a locally laminated face side constru ...


4
Masaki Fujimura, Toyohiko Tadokoro: Set of golf clubs. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, July 18, 1989: US04848747 (138 worldwide citation)

A metallic golf club head having a rear side recess and a synthetic backing situated in the rear side recess, wherein the position of the rear side recess is selectively offset towards the toe of the golf club head in a short club and towards the heel of the golf club head in a long club so as to se ...


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Tatsuo Nakanishi, Toyohiko Tadokoro, Masaki Fujimura: Iron club head for golf. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, October 23, 1990: US04964640 (134 worldwide citation)

In construction of a composite type iron club head for golf having a fiber reinforcement, a synthetic resin backup is used as a substitute for the conventional ring for holding the fiber reinforcement in postion, thereby improving productivity and inertia moment of iron clud head. The fiber reinforc ...


6
Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro, Masaki Fujimura: Golf club head. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, January 17, 1989: US04798383 (101 worldwide citation)

An improved golf club head includes a metallic main body 1 having a face side section 2 providing a face side surface for shooting balls. A rearwardly opening gouge 3 is formed within the main body, extending to an end wall 3a provided by the face side section. An FRP plate 4 is inserted into the go ...


7
Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro, Masaki Fujimura: Golf club head. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, December 20, 1988: US04792139 (99 worldwide citation)

An improved golf club head includes a metallic main body 1 having a face side section 2 providing a face side surface for shooting balls. A rearwardly opening gouge 3 is formed within the main body, extending to an end wall 3a provided by the face side section. An FRP plate 4 is inserted into the go ...


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Yoichi Nagasaki, Toyohiko Tadokoro, Tatsuo Nakanishi, Masaki Fujimura: Method for producing an iron golf club head. Nippon Gakki Seizo Kabushiki Kaisha, Lerner David Littenberg Krumholz & Mentlik, April 26, 1988: US04740345 (85 worldwide citation)

In production of a composite type iron golf club head having a FRP (fiber reinforced plastic) backing in a rear recess, a peripheral flange to be caught by the main body is formed on the FRP backing by providing a bottom peripheral groove in the rear recess for fortified bonding of the FRP backing t ...


9
Masaki Fujimura, Toyohiko Tadokoro: Metallic golf club head. Yamaha Corporation, Lerner David Littenberg Krumholz & Mentlik, May 21, 1991: US05016882 (51 worldwide citation)

In construction of a metallic gold club head having a rear side recess and a composite face situated in front of the rear side recess, the position of the composite face is biased towards the toe or heel depending on the number of the club head in order to assure stabilized course of travel traced b ...


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