US PATENT SUBCLASS 373 / 74
.~.~.~ With cooling

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

60  DF  ARC FURNACE DEVICE {9}
71  DF  .~ Furnace body detail {4}
73  DF  .~.~ Roof {1}
74.~.~.~ With cooling

DEFINITION

Classification: 373/74

With cooling:

(under subclass 73) Subject matter including a means to remove, or reduce heat from the roof.