US PATENT SUBCLASS 122 / 156
.~.~ Fluid fuel

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

135.1  DF  FLUE {4}
155.1  DF  .~ Vertical {16}
156.~.~ Fluid fuel

DEFINITION

Classification: 122/156

(under subclass 155) Vertical flue boilers heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

22, for miscellaneous boilers heated by solid or fluid fuel.

23, for miscellaneous boilers heated by fluid fuel.

115, for vertical fire tube boilers heated by fluid fuel.

161, 167, 177, 179, and 183, for other types of vertical flue boilers heated by fluid fuel.