Selective wear resistance enhancement of striking surface of gol

Details Selective wear resistance enhancement of striking surface of gol Selective wear resistance enhancement of striking surface of gol

1997-03-26

1998-05-26

Passaniti, Sebastiano

Games using tangible projectile

Golf

Club or club support

473331, 473409, A63B 5304

Patent

active

057556261

ABSTRACT:
The invention involves a golf club which has a ball striking surface with horizontally extending grooves on it in which the upper edges of the grooves are harder than the lower edges. The upper edges of the grooves on the ball striking surface are selectively made harder either by directional or non-directional surface treatment processes or by making them from materials which are harder than the materials from which the lower edges of the grooves are made.

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patent: 5029865 (1991-07-01), Kim
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patent: 5303922 (1994-04-01), Lo
patent: 5358249 (1994-10-01), Mendralla
patent: 5437088 (1995-08-01), Igarashi

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