Hog-Trough.
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patent as a primary source within our collections. Researchers, educators, and students may find this patent useful in their work.
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Hog-Trough., patent, April 27, 1897; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth174591/: accessed April 25, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.