Inside Out Library · ExploreAnnual report of the Commissioner of Patents for the year .. (1870)United States. Patent Office · Washington : G.P.O · leaf 401United States. Patent Office · PatentsInternet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.More pictures from Annual report of the Commissioner of Patents for the year ..More like this
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-593-383.webp)
![An illustration from Wedding's Basic Bessemer Process. Translated [from the supplement to the author's Darstellung des schmiedbaren Eisens” entitled, “Basische Bessemer oder Thomas Process”] ... by W. B. Phillips ... and E. Prochaska ... With a supplementary chapter on dephosphorization in the basic open-hearth furnace, by E. Prochaska (1891)](https://img.insideoutlibrary.com/img/200/bl-bl_003874923_0-153-1.webp)
