Improvement in Speed and Time Recorders. Page: 3 of 5
Reference the current page of this Patent.
Improvement in Speed and Time Recorders., patent, September 9, 1879; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth169890/m1/3/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.