Apparatus for playing a ball game
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United States of America Patent
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Feb 12, 1991
Grant Date -
N/A
app pub date -
May 9, 1989
filing date -
May 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for playing a ball game, comprising a playing surface, a plurality of balls having an eccentric distribution of mass, and means for initiating rolling movement of the balls in a way which preserves the orientation of the eccentricity of mass distribution of the ball with respect to a rolling axis thereof.
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