US PATENT SUBCLASS 122 / 337
.~.~.~ Elevated

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
336  DF  .~.~ Offset firebox {1}
337.~.~.~ Elevated

DEFINITION

Classification: 122/337

(under subclass 336) Devices in which the offset firebox is at the top of the boiler.