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Mototaka Iwata, Kenji Onoda, Koji Sakai, Yukihiro Teranishi, Takeshi Naruo, Kazuhiro Ohmori, Yoshihiro Fujikawa: Golf club. Mizuno Corporation, Troutman Sanders, Ryan A Schneider, Gerald R Boss, May 31, 2005: US06899638 (86 worldwide citation)

The inventive golf club comprises a head of a metal having a face and a flexural range, defined in the face, where the quantity of flexure in a direction perpendicular to the face is at least 45% of the maximum quantity of vertical flexure of the face. The flexural range is arranged in coincidence w ...


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Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie: Iron golf club and golf club set. Mizuno Corporation, Gerald R Boss Esq, Troutman Sanders, March 23, 2004: US06709345 (40 worldwide citation)

A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole ...


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Mototaka Iwata, Naoyuki Masuda, Kiyoshi Sugimoto, Koji Sakai: Metal wood club head. Mizuno Corporation, Gerald R Boss, Troutman Sanders, June 11, 2002: US06402639 (37 worldwide citation)

A metal wood club head of a hollow hull structure according to the present invention is such that the vertical difference between a maximum face part height (MFH) from a sole part (


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Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen: Iron golf club and golf club set. Mizuno Corporation, Troutman Sanders, Gerald R Boss, November 7, 2006: US07131913 (31 worldwide citation)

A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole ...


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Mototaka Iwata, Kenji Onoda, Koji Sakai, Yukihiro Teranishi, Takeshi Naruo, Kazuhiro Ohmori, Yoshihiro Fujikawa: Golf club. Troutman Sanders, December 13, 2001: US20010051548-A1 (2 worldwide citation)

The inventive golf club comprises a head of a metal having a face and a flexural range, defined in the face, where the quantity of flexure in a direction perpendicular to the face is at least 45% of the maximum quantity of vertical flexure of the face. The flexural range is arranged in coincidence w ...


9
Mototaka Iwata, Naoyuki Masuda: Iron golf club. Troutman Sanders, December 27, 2001: US20010055996-A1 (1 worldwide citation)

The inventive iron golf club comprises a head part having a face, and a restitution coefficient is in the range of at least 0.81 and not more than 0.95 when colliding a ball against a sweet spot in the face at a speed of 44 m/s. In the aforementioned iron golf club, the effective face area of the he ...


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Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen: Iron gulf club and golf club set. Troutman Sanders, May 30, 2002: US20020065140-A1 (1 worldwide citation)

A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole ...