US PATENT SUBCLASS 473 / 358
.~.~.~.~ Hollow core

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

131  DF  GOLF {23}
351  DF  .~ Ball {8}
356  DF  .~.~ Wound interior {1}
357  DF  .~.~.~ Surrounding non-wound spherical core {5}
358.~.~.~.~ Hollow core

DEFINITION

Classification: 473/358

Hollow core:

(under subclass 357) Subject matter wherein the innermost spherical portion is devoid of any liquid or solid material.