发明名称 Sound producing device
摘要 A sound producing ball includes concentric inner and outer ball elements and a plurality of sound producing particles in an open area therebetween. The sound producing particles are dimensioned to travel in the open area when the ball is rotated, and the inner ball element has a plurality of projections thereon for redirecting the sound producing particles as they travel in the open area. The sounds produced by the sound particles as they strike the inner and outer ball elements are generally similar to the sound of rain striking a building roof.
申请公布号 US5611721(A) 申请公布日期 1997.03.18
申请号 US19950573674 申请日期 1995.12.18
申请人 HOETING, MICHAEL G.;MULLANEY, SEAN 发明人 HOETING, MICHAEL G.;MULLANEY, SEAN
分类号 A63B43/00;A63H5/00;(IPC1-7):A63H5/00 主分类号 A63B43/00
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