US PATENT SUBCLASS 122 / 209.2
.~ Feeding air

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

209.1  DF  SECTIONAL {9}
209.2.~ Feeding air

DEFINITION

Classification: 122/209.2

Feeding air:

(under subclass 209.1) Devices wherein tubes are provided to admit outside air and allow the escape of this air into the fire box once heated.