US PATENT SUBCLASS 473 / 77
.~.~.~.~ With spring detent

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

54  DF  BOWLING {6}
64  DF  .~ Handling of pin or pin representation {9}
73  DF  .~.~ Pin setter {8}
75  DF  .~.~.~ Pivotal pin {2}
77.~.~.~.~ With spring detent

DEFINITION

Classification: 473/77

With spring detent:

(under subclass 75) Apparatus including resilient means for retaining the target out of the field of play after it has been struck by the bowling ball.