US PATENT SUBCLASS 165 / DIG 537
.~.~ Oblong or elliptical

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 532  DD  HEAT EXCHANGE CONDUIT STRUCTURE {4}
DIG 536  DD  .~ Noncircular cross-section {1}
DIG 537.~.~ Oblong or elliptical