(under the class definition) Boilers not otherwise classifiable having water fireboxes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2, for garbage burning plants disclosing boilers with water fireboxes.
8+, for industrial furnaces having water fireboxes.
15, for stand boilers having water fireboxes.
44+, for fire tube boilers.
135+, for most of the patents for boilers with water fireboxes, but claiming or disclosing more than a water firebox. 189, 190, 193+, for horizontal cylindrical boilers with water fireboxes.
209+, for boilers made of separate parts.
235+, for special combinations of water fireboxes with water tube boilers, and especially subclasses 241 and 252, for water fireboxes.
