Mark Identification
PERFEX X CHANGER
Serial Number
73005087
Filing Date
Oct 31, 1973
Registration Date
Nov 4, 1975
Trademark by
Classification Information
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
Environmental Control Apparatus