Golf clubhead
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United States of America Patent
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N/A
Issued Date -
Jul 1, 2004
app pub date -
Dec 12, 2003
filing date -
Jun 25, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Golf clubhead (1) made from metal, having a strike face (2) which has a loft angle .alpha. of greater than 45.degree..degree., said strike (2) face having has a plurality of parallel grooves (10), characterized in that the strike face (2) has a surface roughness Ra of less than 0.25 micrometre, and in that the Vickers hardness of the strike face (2) is greater than 5 GigaPascal.
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