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Report of the Commissioner of Patents for the year .. (1849)
United States. Patent Office · Washington : Office of Printers to House of Reps. · leaf 508
478 Xin. — GRINDING MILLS, &C. … 21. 181 <s^ ^--v. ff ^M, <^ ffmW' \ w^ \ 20950 <-nr^~^w^^' "^ m ■ y"A^^2z___ % ■^^<^K^ -^V ^ '^ ^^ 20084United States. Patent Office · Patents · Agriculture
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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