US PATENT SUBCLASS 122 / 137
.~.~ Plural

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}
137.~.~ Plural {1}
138  DF  .~.~.~> Water tube

DEFINITION

Classification: 122/137

(under subclass 136) A plurality of devices either posited side by side or superposed one above the other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

52, for similar arrangement of fire tube boilers.