US PATENT SUBCLASS 122 / 135.3
.~ Sinusoidal flue

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

135.1  DF  FLUE {4}
135.3.~ Sinusoidal flue

DEFINITION

Classification: 122/135.3

Sinusoidal flue:

(under subclass 135.1) Devices wherein the flue turns back on itself in an undulating manner.