http://pec.lib.wvu.edu/record/P160631899Jacob P. Shafer, of Terra Alta, West Virginia, Car and pipe coupling, specification forming part of letters patent no. 638,403, dated December 5, 1899.<p> Photocopy of patent application. "Application filed June 8, 1899. Serial No. 719,828. (No model)."</p>United States. Patent Office.Patents--United States.Couplings--Patents.Shafer, Jacob P.14256