US PATENT SUBCLASS 122 / 52
.~.~ Plural

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
52.~.~ Plural {1}
53  DF  .~.~.~> Water tube

DEFINITION

Classification: 122/52

(under subclass 51) Devices having two or more boilers arranged side by side or superposed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82, and 137, for horizontal flue boilers with the same arrangement.