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Improvement in Car-Couplings.

Description: Patent for an improvement in car-couplings with illustrations.
Date: May 30, 1876
Creator: Darrow, Nicholas
Partner: UNT Libraries Government Documents Department

Improvement in Sewing-Machine Thread-Guards.

Description: Patent for "a guard attachment to the Wheeler & Wilson sewing-machine for preventing the thread from being thrown off the tension by the work, and for preventing the thread from running off the spool onto the spindle." (Lines 6-11) Includes instructions and illustrations.
Date: December 21, 1875
Creator: Roosevelt, Lillian
Partner: UNT Libraries Government Documents Department

Improvement in Teeth for Cotton-Gin Saws.

Description: Patent for new useful improvement of the cotton-gin saws that consists of the dress or shape of the teeth, includes instructions and illustrations.
Date: May 6, 1873
Creator: Oglesby, Thomas B.
Partner: UNT Libraries Government Documents Department
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