US PATENT SUBCLASS 473 / 281
.~.~ Having air resistance device

Current as of: June, 1999
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473 /   HD   GAMES USING TANGIBLE PROJECTILE

131  DF  GOLF {23}
280  DF  .~ Practice projectile {1}
281.~.~ Having air resistance device

DEFINITION

Classification: 473/281

Having air resistance device:

(under subclass 280) Subject matter wherein the object so constructed that a part thereof reacts with the atmosphere to alter its trajectory after being struck.