Item #18 on the "To-Do" list was "A copying press that will take 100 copies & system." Later in 1875 Edison developed the electric pen, or autographic copier, which perforated treated paper with an electrically powered needle to create a stencil. He patented it the next year. In 1891 Samuel F. O'Reilly patented the first electric tattoo needlethe electric pen with an ink reservoir! (You will need the Adobe Acrobat viewer to see these patents.)