U.S. federal trademark · Serial No. 85588893 · Reg. No. 4249764
Engineering services all relating to installations for collecting dust from industrial process gas streams and from industrial gas for air cleaning operations, chemical engineering plant for use in the control of environmental pollution, electro-precipitators for removing dust particles from gases, gas cleaning machines, [ fluidized bed apparatus for the treatment of gases or solids, calcination apparatus, roasting apparatus, drying apparatus, incinerators, installations for cleaning water or effluents, cooling towers, ] gas valves and discharge valves, and for filters
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