US PATENT SUBCLASS 122 / 126
.~.~ Water firebox

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

44.1  DF  FIRE TUBE {11}
114  DF  .~ Vertical {13}
126.~.~ Water firebox {2}
127  DF  .~.~.~> Annular
128  DF  .~.~.~> Central magazine

DEFINITION

Classification: 122/126

(under subclass 114) Devices having a water firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48, and 178+, for analogous structure.

120, for offset fireboxes.

122, for return fire tube vertical fire tube boilers with a water firebox.