Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomio Kumamoto0
Date of Patent
December 25, 2007
Patent Application Number
11102791
Date Filed
April 11, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A golf club head comprises a metallic main body provided with an opening, and a FRP part covering the opening. The FRP part has a layered structure comprising a plurality of layers each made of a resinous material reinforced with fibers, wherein the layers include a high-loss-tangent layer whose resinous material has a loss tangent tan δa of from 0.5 to 3.0.
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