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WHISTLE BALL

  • US 20100203987A1
  • Filed: 02/12/2009
  • Published: 08/12/2010
  • Est. Priority Date: 02/12/2009
  • Status: Active Grant
First Claim
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1. A ball, comprising:

  • (a) a body having an outer surface;

    (b) a chamber disposed within the body, the chamber having a concave curvature in at least two orthogonal directions; and

    (c) an aperture disposed in the body, the aperture defining a fluid connection between the chamber and the outer surface, wherein a flow of air across the aperture produces a whistling sound.

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