US PATENT SUBCLASS 122 / 239
.~ Superimposed firebox


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

235.11  DF  WATER TUBE {52}
239.~ Superimposed firebox


DEFINITION

Classification: 122/239

(under subclass 235) Water tube boilers having a plurality of superimposed fireboxes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2, 25, 67, 204, 205, 214, 240, and 372, for boilers with fireboxes or fluid fuel burners superimposed one above the other.