US PATENT SUBCLASS 122 / 144
.~.~.~ Subjacent firebox

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


122 /   HD   LIQUID HEATERS AND VAPORIZERS

135.1  DF  FLUE {4}
136 R  DF  .~ Horizontal {7}
140.1  DF  .~.~ Internal water tube {7}
144.~.~.~ Subjacent firebox

DEFINITION

Classification: 122/144

(under subclass 140) Devices having water tubes in the flue, with a firebox located beneath the boiler.