A 3D model of U.S. Pat. No. 163,918. Cutting edge 1875 pot scraper technology from the original Thingiverse—the U.S. PTO.
"To all whom it may concern: Be it known that I, URIAS CRAMER, of New Philadelphia, in the county of Tuscarawas and State of Ohio, have invented certain new and useful Improvements in Pot-Scrapers; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification."