Games using tangible projectile – Playing field or court game; game element or accessory... – Practice or training device
Patent
1997-01-23
1998-01-27
Graham, Mark S.
Games using tangible projectile
Playing field or court game; game element or accessory...
Practice or training device
473598, A63B 6900
Patent
active
057117250
ABSTRACT:
A two colored baseball or softball for practice. One half of the outer surface is a dark color and one half is light to make the ball more difficult to see than a standard ball. When used for practice, the ball requires players to concentrate intensely in order to hit or field it successfully because of the difficulty of seeing it clearly. During games when a light colored ball is used, it is much more visible and players are able to hit and field it better because they are used to practicing with the two colored practice ball.
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Playthings, Mar. 1951.
Golf Digest, Dec. 1986, p.116.
"Worth Catalogue", pp. 7,Copy available in USPTO 473/FOR135.
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