11 HEAT TRANSFER DEVICES, THERMAL MACHINES, AND HEAT EXCHANGERS-NAMELY, COOLERS FOR AIR AND GASES, HEAT EXCHANGERS FOR HEATING AND COOLING FLUIDS, AIR HEATERS, FEED WATER HEATERS, AND FUEL OIL HEATING SYSTEMS
PERFECT CHANGER
Trademark Events
Aug 12, 1996
Expired Sec. 9
Jun 16, 1981
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.