US PATENT SUBCLASS 122 / 276
.~.~ Firebox enclosing

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

235.11  DF  WATER TUBE {52}
275  DF  .~ Loop {3}
276.~.~ Firebox enclosing

DEFINITION

Classification: 122/276

(under subclass 275) Devices having a firebox located within the loops.