US PATENT SUBCLASS 122 / 235.22
.~ Wall loop

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

235.11  DF  WATER TUBE {52}
235.22.~ Wall loop

DEFINITION

Classification: 122/235.22

Wall loop:

(under subclass 235.11) Devices wherein a plurality of tubes are connected together and arranged to form at least a

portion of the boundary wall of a gas-tight enclosure.