US PATENT SUBCLASS 434 / 208
.~.~ Ball, block, or disk

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

188  DF  MATHEMATICS {4}
191  DF  .~ Arithmetic {17}
208.~.~ Ball, block, or disk

DEFINITION

Classification: 434/208

Ball, block, or disk:

(under subclass 191) Subject matter including a sphere, a generally cubical element, or a thin circular object.