Pipe Gripping Device., patent, March 7, 1916; (https://texashistory.unt.edu/ark:/67531/metapth859767/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Pipe Gripping Device., patent, March 7, 1916; (https://texashistory.unt.edu/ark:/67531/metapth859767/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .