U.S. Pat. No. 163,918

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A 3D model of U.S. Pat. No. 163,918 showcases pioneering 1875 pot scraper technology from the original Thingiverse—the U.S. PTO. "To all who may be concerned: It is hereby known that I, Urias Cramer, of New Philadelphia, in Tuscarawas County and Ohio State, have invented certain new and useful improvements in pot scrapers; and I declare that the following is a complete, clear, and exact description thereof, which will enable others skilled in the relevant art to make and use the same, reference being made to the accompanying drawings and to the letters of reference marked thereon, which form part of this specification."