Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mark J. Oblack0
Joseph W. Kent0
Justin A. Bagley0
Kyle D. Burger0
Date of Patent
July 12, 2011
0Patent Application Number
123704450
Date Filed
February 12, 2009
0Patent Citations Received
Patent Primary Examiner
Patent 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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