IC 011. US 013 021 023 031 034. G & S: water and wastewater purifying and treating equipment, namely, clarifiers and biological treatment reactors and parts thereof for residential and municipal water works and industrial plants; aerators for sewage and wastewater treatment plants; sewage disposal and pumping equipment, namely, sewage pumping stations and parts thereof and sludge concentrations. FIRST USE: 19490401. FIRST USE IN COMMERCE: 19490401
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