Nut-Lock., patent, November 28, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173573/m1/1/: accessed May 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Nut-Lock., patent, November 28, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173573/m1/1/: accessed May 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .