US PATENT SUBCLASS 122 / 183
.~.~.~ 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}
*  DD  .~.~ Spiral water conduit {1}
183.~.~.~ Fluid fuel


DEFINITION

Classification: 122/183

(under subclass 155) Devices comprising one or more annular chambers having spiral water passages vertically posited, with or without a fluid fuel burner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161, and 501+, for related art.