Rope-Clamp, patent, August 14, 1911; (https://texashistory.unt.edu/ark:/67531/metapth510625/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Rope-Clamp, patent, August 14, 1911; (https://texashistory.unt.edu/ark:/67531/metapth510625/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .