US PATENT SUBCLASS 110 / 340
.~.~ And metal casing


Current as of: June, 1999
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110 /   HD   FURNACES

338  DF  BRICK ELEMENT {1}
339  DF  .~ Having hanger {1}
340.~.~ And metal casing


DEFINITION

Classification: 110/340

And metal casing:

(under subclass 339) Structure further provided with a metallic sheathing enclosing substantially all of the brick element.

(1) Note. The metallic casing acts as a seal between adjacent brick when assembled.