Whistle ball

Details Whistle ball Whistle ball

2011-07-12

2011-07-12

Wong, Steven (Department: 3711)

Games using tangible projectile

Projectile, per se; part thereof or accessory therefor

With sound-producing means

C473S613000

Reexamination Certificate

active

07976417

ABSTRACT:
A ball includes a body having an outer surface. A chamber is disposed within the body and has a concave curvature in at least two orthogonal directions. An aperture defines a fluid connection between the chamber and the outer surface of the ball. Air flow across the aperture produces a whistling sound.

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