The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2007
Filed:
Apr. 20, 2006
Applicants:
Takeshi Ashino, Hyogo, JP;
Kunio Niwa, Hyogo, JP;
Inventors:
Takeshi Ashino, Hyogo, JP;
Kunio Niwa, Hyogo, JP;
Assignee:
SRI Sports Limited, Kobe-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63B 49/02 (2006.01); A63B 49/10 (2006.01);
U.S. Cl.
CPC ...
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.