Invention Grant
US08684868B2 Ball for use in teaching pitching skills 有权
球用于教授投球技巧

Ball for use in teaching pitching skills
Abstract:
A ball for use in teaching proper throwing or pitching techniques in baseball or softball is disclosed. The ball provides an internal mechanism by way of a snap device or a channel having a shiftable weighted material to provide both an audible and visible indication of when a proper wrist snap release of the ball has occurred. The internal mechanisms disclosed can be incorporated into newly manufactured baseballs or softballs or placed into preexisting balls.
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