US PATENT SUBCLASS 165 / DIG 4
.~ Sight glass

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

Internet Version by PATENTEC © 1999      Terms of Use


165 /   HD   HEAT EXCHANGE

DIG 1  DD  WITH ALARM, INDICATOR, RECORDER, TEST, OR INSPECTION MEANS {7}
DIG 4.~ Sight glass