Golf club having stepped grooves

Games using tangible projectile – Golf – Club or club support

Reexamination Certificate

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Reexamination Certificate

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07056226

ABSTRACT:
A golf club head is characterized by stepped grooves in the striking face thereof. The serrated grooves are defined by opposed side walls each having at least one step portion intermediate the length thereof. The stepped grooves impart more consistent spin to a golf ball when struck by the club head.

REFERENCES:
patent: 5618239 (1997-04-01), Rife
patent: 5766087 (1998-06-01), Kawamatsu
patent: 6348010 (2002-02-01), Doolen
patent: 6368231 (2002-04-01), Chen
patent: 6398665 (2002-06-01), Antonious
patent: 6719644 (2004-04-01), Beach
patent: 6733400 (2004-05-01), Sherwood
patent: 6814673 (2004-11-01), Wahl et al.
patent: 6981923 (2006-01-01), Chappell
patent: 2002/0042306 (2002-04-01), Chappell
United States Golf Association Club Standards; Appendix II—Design of Clubs; pp. 114-116.

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