US Patent 7311614 Golf club head
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Patent Inventor Names
Tomio Kumamoto0
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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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US Patent 07311614 Golf club head US Patent 7311614 Golf club head
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Patent Number
07311614
Patent Number
7311614
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US Patent 07311614 Golf club head
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Is a
Patent jurisdiction
Patent number
07311614
Date of patent
December 25, 2007
Patent application number
11102791
Date Filed
April 11, 2005
Patent primary examiner
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