US PATENT SUBCLASS 434 / 298
.~ Chemistry or metallurgy

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

276  DF  SCIENCE {9}
298.~ Chemistry or metallurgy

DEFINITION

Classification: 434/298

Chemistry or metallurgy:

(under subclass 276) Subject matter relating to the science dealing with the composition, structure, and properties of substances such as chemicals or metals and the transformations that they undergo.