Electric-Current Meter., patent, November 28, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173574/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Electric-Current Meter., patent, November 28, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173574/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .