Spark-Arrester., patent, April 23, 1907; (https://texashistory.unt.edu/ark:/67531/metapth514022/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Spark-Arrester., patent, April 23, 1907; (https://texashistory.unt.edu/ark:/67531/metapth514022/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .