US PATENT SUBCLASS 122 / *
.~ Water firebox

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

371  DF  WATER GRATE {5}
*.~ Water firebox {2}
*  DD  .~.~> Solid and water bar {1}
378  DF  .~.~> Updraft