US PATENT SUBCLASS 503 / 211
.~.~ Metal of atomic number 22-30

Current as of: June, 1999
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503 /   HD   RECORD RECEIVER HAVING PLURAL INTERACTIVE LEAVES OR A COLORLESS COLOR FORMER, METHOD OF USE, OR DEVELOPER THEREFOR

200  DF  HAVING A COLORLESS COLOR-FORMER, DEVELOPER THEREFOR, OR METHOD OF USE {16}
210  DF  .~ Heavy metal reactant {1}
211.~.~ Metal of atomic number 22-30 {1}
212  DF  .~.~.~> Zinc

DEFINITION

Classification: 503/211

Metal of atomic number 22 - 30:

(under subclass 210) Subject matter wherein the metal is titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper or zinc.