Portable Waiter, patent, July 13, 1909; (https://texashistory.unt.edu/ark:/67531/metapth509096/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Portable Waiter, patent, July 13, 1909; (https://texashistory.unt.edu/ark:/67531/metapth509096/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .