US PATENT SUBCLASS 434 / 190
.~ Magnet included in teaching means

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

188  DF  MATHEMATICS {4}
190.~ Magnet included in teaching means

DEFINITION

Classification: 434/190

Magnet included in teaching means:

(under subclass 188) Subject matter including a magnet.