US PATENT SUBCLASS 420 / 511
.~ Silver containing
Current as of:
June, 1999
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420 /
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ALLOYS OR METALLIC COMPOSITIONS
507
DF
GOLD BASE
{4}
511
.~ Silver containing
DEFINITION
Classification: 420/511
Silver containing:
(under subclass 507) Alloy, or metallic composition which additionally contains silver.