Knockdown Seat., patent, July 30, 1907; (https://texashistory.unt.edu/ark:/67531/metapth510254/m1/1/: accessed July 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Knockdown Seat., patent, July 30, 1907; (https://texashistory.unt.edu/ark:/67531/metapth510254/m1/1/: accessed July 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .