About 2 Trademarks found that are filed by the attorney Carl A Rowold Esq

mechanical flotation machine for separation of suspended solids, oils, or organics from effluents and for adding or removing oxygen from liquids

process measuring instruments used in various industries, such as chemical, petrochemical, refining, food, water and waste water, mining pulp and paper, primary measuring devices with sensors to measure level, flow, density and weight