US PATENT SUBCLASS 473 / 181
.~.~.~.~ Selectively adjustable approach surface

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

131  DF  GOLF {23}
173  DF  .~ Target or obstacle (e.g., putting hole, hole marker, sand trap, etc.) {5}
174  DF  .~.~ Target on putting surface {2}
180  DF  .~.~.~ Receiver or projectile responsive indicator {4}
181.~.~.~.~ Selectively adjustable approach surface

DEFINITION

Classification: 473/181

Selectively adjustable approach surface:

(under subclass 180) Subject matter wherein means is provided to alter the slope of the surface on which the object is rolled.