US PATENT SUBCLASS 473 / 399
.~.~ Particular biodegradable or frangible material

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

131  DF  GOLF {23}
387  DF  .~ Tee {10}
399.~.~ Particular biodegradable or frangible material

DEFINITION

Classification: 473/399

Particular biodegradable or frangible material:

(under subclass 387) Subject matter wherein the device is formed of a material which accelerates its decomposition by natural biological process, or which shatters if impacted by an implement swung by the player.