U.S. federal trademark · Serial No. 87469944
energy recovery devices, namely, pressure exchangers; energy recovery devices, namely, pressure exchangers for use in the field of water treatment, water purification, and desalination; pressure transferors, namely, energy transfer machines having a multi-channel rotor for the transfer of pressure between high and low pressure fluids, particularly for the water treatment industry, including component parts and instruction manuals sold as a unit therewith
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