Triple-Valve Mechanism., patent, December 8, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859597/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Triple-Valve Mechanism., patent, December 8, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859597/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .