Racket frame

Details Racket frame Racket frame

2006-11-07

2006-11-07

Chiu, Raleigh W. (Department: 3711)

Games using tangible projectile

Player held and powered, nonmechanical projector, per se,...

Racket or paddle; accessory therefor

C473S536000, C473S537000, C473S521000

Reexamination Certificate

active

07131920

ABSTRACT:
A racket frame including a first laminate composed of a plurality of first prepregs consisting of fiber reinforced resin and a second prepreg, consisting of fiber reinforced resin, which is layered on the first laminate. The first laminate has a loss factor (=tan δ) set to not less than 0.005 nor more than 0.02, when the loss factor is measured at a temperature of 10° C. and a frequency of 10 Hz. The second prepreg has a loss factor (=tan δ) set to not less than 0.10 nor more than 0.50, when the loss factor is measured at a temperature of 10° C. and a frequency of 10 Hz.

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