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Improvement in Plows

Description: Patent for the improvement of plows, with illustration.
Date: August 13, 1878
Creator: Johnson, Felix
Partner: UNT Libraries Government Documents Department

Improvement in Fire-Escapes and Extension-Ladders.

Description: Patent for a truck-mounted "portable extension-ladder that may be used by firemen in gaining access to buildings, and may also be used as a fire escape" (lines 15-17) including illustration.
Date: August 7, 1877
Creator: Hoyt, William A.
Partner: UNT Libraries Government Documents Department

Improvement in Plow-Couplings.

Description: Patent for a new and useful Improvement in Plow-Coupling including illustration.
Date: August 19, 1873
Creator: Thrasher, Thomas L.
Partner: UNT Libraries Government Documents Department
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