US PATENT SUBCLASS 219 / 157
.~ Rivets

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
157.~ Rivets

DEFINITION

Classification: 219/157

(under subclass 50) Subject matter in which the metal heated is a rivet.