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Improvement in Plows.

Description: Patent for an improvement in plow design, including illustrations.
Date: February 25, 1873
Creator: Nichols, James R.
Partner: UNT Libraries Government Documents Department

Rolling Cattle-Guard.

Description: Patent for a serrated device that prevents cattle from escaping.
Date: December 25, 1917
Creator: Belto, Thomas M.
Partner: UNT Libraries Government Documents Department
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