Tape Feeding And Checking Register, patent, March 30, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1256928/m1/3/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Tape Feeding And Checking Register, patent, March 30, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1256928/m1/3/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .