U.S. federal trademark · Serial No. 72272836 · Reg. No. 0887505
EXHAUST UNIT WHICH COMPRISES A MOTOR DRIVEN BLOWER WITH AN OUTLET DUCT AND NOZZLE FOR MOUNTING IN A SMOKE STACK, AND THE LIKE, WHICH CAUSES AN ARTIFICIAL DRAFT WITHIN THE SMOKE STACK TO EXHAUST SMOKE, FUMES AND DUST AT HIGH VELOCITY
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