A - Human Necessities – 63 – B
Patent
A - Human Necessities
63
B
A63B 53/04 (2006.01) A63B 59/00 (2006.01)
Patent
CA 2365598
In a metal iron golf club head, the rigidity of the medium sensitivity region which is a region on the heel side and excluding the vicinity of the face center is made lower than the rigidity of the low sensitivity region so as to approximate the natural frequency of the metal iron golf club head to the natural frequency of the ball as well as to ensure adequate strength in the face portion.
Fujikawa Yoshihiro
Naruo Takeshi
Sakai Koji
G. Ronald Bell & Associates
Mizuno Corporation
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