The inventor's universal educator : An educational cyclopaedia and guide for inventors, patentees, manufacturers, mechanics and all others connected directly or indirectly with patents (1906)
Dieterich, Fred G., 1858-1923, comp · Washington, D.C. : F. G. Dieterich · leaf 56
^9S
Patents · Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
