Means for Grinding Triple Valves. Page: 1 of 3
Reference the current page of this Patent.
Means for Grinding Triple Valves., patent, July 27, 1909; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth514877/m1/1/: accessed August 20, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.