1
Yasunori Imamoto, Hisashi Yamagishi: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, May 12, 2009: US07530901 (158 worldwide citation)

A hollow golf club head includes a fiber-reinforced-plastic body and a metal body. The fiber-reinforced-plastic body includes a main portion of a crown portion. The metal body includes a face portion, a front edge portion of the crown portion continuous with the face portion, and a central portion o ...


2

3
Yuu Hasebe, Hirato Shimasaki, Makoto Kubota, Daisuke Mikame, Yasunori Imamoto: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, January 22, 2002: US06340337 (96 worldwide citation)

A golf club head having a hollow construction, including a bar-like gravity adjusting piece (


4
Yasunori Imamoto: Golf club head. Bridgestone Sport Corporation, Sughrue Mion Pllc, September 25, 2007: US07273423 (87 worldwide citation)

To provide a golf club head in which a sole portion has a high rigidity. A weight material is mounted near a central part of the sole portion in the fore-to-aft direction, and a rib extends in the toe-to-heel direction. Since the sole portion has high rigidity in the toe-to-heel direction, there is ...


5
Yasunori Imamoto, Hisashi Yamagishi: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, March 18, 2008: US07344452 (84 worldwide citation)

A golf club head includes a front body formed of a titanium-based metal material, an FRP body, a metallic sole plate, and a weight member. The front body has a face portion, a metal sole portion, a metal side portion (toe), a metal crown portion, a metal side portion (heel), and a hosel portion. A s ...


6
Yasunori Imamoto, Hisashi Yamagishi: Golf club head. Bridgestone Sports, Sughrue Mion Pllc, January 15, 2008: US07318782 (82 worldwide citation)

A golf club head includes a front body formed of a metal material, an FRP body, a metallic sole plate, and a weight member. The front body has a face portion, a metal sole portion, a metal side portion (toe), a metal crown portion, a metal side portion (heel), and a hosel portion. A slight gap in a ...


7
Yasunori Imamoto: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, December 4, 2007: US07303486 (79 worldwide citation)

A golf club head made of metal includes a face surface, a back surface, and an elastic body. Plural hollow portions are defined between the face surface and the back surface and are arranged in an upper and lower direction. The elastic body is filled in the lowermost hollow portion. The plural hollo ...


8
Hisashi Yamagishi, Yasunori Imamoto: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, March 25, 2008: US07347795 (75 worldwide citation)

A golf club head includes a front body formed of a titanium-based metal material, an FRP body, a metallic sole plate, and a weight member. The front body has a face portion, a metal sole portion, a metal side portion (toe), a metal crown portion, a metal side portion (heel), and a hosel portion. A s ...


9
Hideo Shimazaki, Yasunori Imamoto: Golf club head. Bridgestone Sports, Sughrue Mion Pllc, February 5, 2008: US07326472 (74 worldwide citation)

A head body of a golf club head has a hollow portion defined by an outer wall. An opening portion is provided in a part of the head body. A small tungsten alloy piece having a shape fittable to the opening portion so as to cover the opening portion is fixedly attached to the opening portion by weldi ...


10
Hiroshi Ezaki, Yasunori Imamoto: Golf club head. Bridgestone Sports, Sughrue Mion PLLC, October 21, 2008: US07438649 (70 worldwide citation)

A golf club head is formed from a front-face body made of a metal material, an FRP body, a metal sole plate, and a weight member. The front-face body is formed from a front-face body main body made of a crystalline metal, and a face plate which is fitted in an opening of the front-face body main bod ...