Improvement in Angle-Plates for Doors., patent, October 14, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169903/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improvement in Angle-Plates for Doors., patent, October 14, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169903/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .