Safety-Clamp for Spectacle-Cases &c., patent, February 1, 1910; (https://texashistory.unt.edu/ark:/67531/metapth511131/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Safety-Clamp for Spectacle-Cases &c., patent, February 1, 1910; (https://texashistory.unt.edu/ark:/67531/metapth511131/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .