Drinking-Cup., patent, March 11, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256400/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Drinking-Cup., patent, March 11, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256400/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .