Blind-Stop., patent, August 18, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172764/m1/1/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Blind-Stop., patent, August 18, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172764/m1/1/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .