Rotary and Method of Securing the Pipe-Gripped Device Thereon
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Rotary and Method of Securing the Pipe-Gripped Device Thereon, patent, February 25, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth509293/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.