Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takeshi Ashino0
Kunio Niwa0
Date of Patent
September 25, 2007
0Patent Application Number
114070920
Date Filed
April 20, 2006
0Patent Primary Examiner
Patent abstract
A tennis racket frame is composed of a laminate of prepregs each containing carbon fibers serving as a reinforcing fiber thereof. At least one part of layers of the laminate is formed as a hard layer consisting of a prepreg composed of the reinforcing carbon fibers and a hard carbon film (DLC film) formed on the surface of the carbon fibers.
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