US PATENT SUBCLASS 110 / 334
.~.~.~ And convex surface area

Current as of: June, 1999
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110 /   HD   FURNACES

331  DF  ARCH OR ROOF STRUCTURE {2}
332  DF  .~ Planar surface area {1}
333  DF  .~.~ Inclined {1}
334.~.~.~ And convex surface area

DEFINITION

Classification: 110/334

And convex surface area:

(under subclass 333) Structure further provided with an outwardly curved contoured area.

(1) Note. The convex surface is usually known as a nose arch.