Nut Lock., patent, April 27, 1886; (https://texashistory.unt.edu/ark:/67531/metapth171241/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Nut Lock., patent, April 27, 1886; (https://texashistory.unt.edu/ark:/67531/metapth171241/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .