Changeable Gearing., patent, January 8, 1901; (https://texashistory.unt.edu/ark:/67531/metapth508294/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Changeable Gearing., patent, January 8, 1901; (https://texashistory.unt.edu/ark:/67531/metapth508294/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .