combination lock, patent, December 25, 1906; (https://texashistory.unt.edu/ark:/67531/metapth514552/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
combination lock, patent, December 25, 1906; (https://texashistory.unt.edu/ark:/67531/metapth514552/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .