US PATENT SUBCLASS 220 / 62.16
.~ Copper layer

Current as of: June, 1999
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220 /   HD   RECEPTACLES

62.11  DF  RECEPTACLE SIDE WALL MADE OF TWO OR MORE LAYERS OF MATERIAL PERMANENTLY ATTACHED TOGETHER {10}
62.16.~ Copper layer

DEFINITION

Classification: 220/62.16

Copper layer:

(under subclass 62.11) Subject matter wherein one of the layers is copper.