US PATENT SUBCLASS 122 / 155.5
.~.~ Having undulating flue

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}
155.5.~.~ Having undulating flue

DEFINITION

Classification: 122/155.5

Having undulating flue:

(under subclass 155.1) Devices wherein the flue is shaped in wavelike or sinusoidal form.