US PATENT SUBCLASS 122 / 260
.~ Flat

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

235.11  DF  WATER TUBE {52}
260.~ Flat {1}
261  DF  .~.~> Volute

DEFINITION

Classification: 122/260

(under subclass 235) Water tube boilers having flat tubes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39, for film type boilers.

40+, for flasher boilers.

242+, for capillary tubes.