US PATENT SUBCLASS 165 / DIG 496
.~.~ Spiral or helical coil

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 454  DD  HAVING SIDE-BY-SIDE CONDUITS STRUCTURE OR CONDUIT SECTION {16}
DIG 495  DD  .~ Single unitary conduit structure bent to form flow path with side-by-side sections {2}
DIG 496.~.~ Spiral or helical coil