US PATENT SUBCLASS 216 / 32
.~ Treating elemental metal or alloy thereof

Current as of: June, 1999
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216 /   HD   ETCHING A SUBSTRATE: PROCESSES

28  DF  FORMING OR TREATING AN ORNAMENTED ARTICLE {4}
32.~ Treating elemental metal or alloy thereof

DEFINITION

Classification: 216/32

Treating elemental metal or alloy thereof:

(under subclass 28) Process wherein metal or an thereof is treated to produce a decorative effect thereon.