Swivel Joint Page: 1 of 3
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D. O'BRIEN.
swIVEL JOINT,
APPLICATION tILED JUNE 4,1918.1,303,714.
Patented May 13, 1919.
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INVENTOR
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O'Brien, Daniel. Swivel Joint, patent, Date Unknown; Washington D.C.. (https://texashistory.unt.edu/ark:/67531/metapth1257214/m1/1/?q=%22%22~1: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.