Nut Lock, patent, June 11, 1907; (https://texashistory.unt.edu/ark:/67531/metapth513902/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Nut Lock, patent, June 11, 1907; (https://texashistory.unt.edu/ark:/67531/metapth513902/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .