U.S. federal trademark · Serial No. 72156527 · Reg. No. 814
MACHINES FOR THE TREATMENT OF SEWAGE AND/OR INDUSTRIAL EFFLUENTS WHEREBY SOLIDS ARE MAINTAINED IN SUSPENSION IN A BODY OF LIQUID AND AIR OR OTHER GAS ENTRAINED FOR THE PURPOSE OF DISSOLVING THE GAS, OR FOR THE PURPOSE OF CHEMICAL REACTION OR FROTH FORMATION
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