Piston Packing., patent, February 7, 1888; (https://texashistory.unt.edu/ark:/67531/metapth171707/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Piston Packing., patent, February 7, 1888; (https://texashistory.unt.edu/ark:/67531/metapth171707/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .