Machine for Sharpening Cutlery., patent, November 7, 1911; (https://texashistory.unt.edu/ark:/67531/metapth511063/m1/2/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Machine for Sharpening Cutlery., patent, November 7, 1911; (https://texashistory.unt.edu/ark:/67531/metapth511063/m1/2/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .