US PATENT SUBCLASS 33 / 289
.~.~ Game ball (e.g., football, etc.)

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
286  DF  .~ Alignment device {3}
289.~.~ Game ball (e.g., football, etc.)

DEFINITION

Classification: 33/289

(under subclass 286) Device comprising means for locating a ball longitudinally of a playing field with reference to a previous location of the ball on the field.