US PATENT SUBCLASS 237 / 11
.~ Compressed air


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



237 /   HD   HEATING SYSTEMS

2 R  DF  AUTOMATIC CONTROL {9}
11.~ Compressed air


DEFINITION

Classification: 237/11

(under subclass 2) Automatic control in which air is compressed and thereby heated and circulated through the radiators.