Coupling For Well-Drilling Tools. Page: 1 of 3
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Coupling For Well-Drilling Tools., patent, October 3, 1899; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth511653/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.