Pressure-Controlling Valve Mechanism For Hydraulic Presses.
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Pressure-Controlling Valve Mechanism For Hydraulic Presses., patent, November 8, 1898; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth510538/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.