Automatic Relief Valve for Pneumatic Seed Cotton Distributers.
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Automatic Relief Valve for Pneumatic Seed Cotton Distributers., patent, January 6, 1903; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth508183/: accessed May 28, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.