US PATENT SUBCLASS 122 / 8
.~ Water firebox

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

6 R  DF  INDUSTRIAL {7}
8.~ Water firebox {1}
9  DF  .~.~> Water tube type

DEFINITION

Classification: 122/8

(under subclass 6) Industrial boilers having a water jacket firebox.