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Machine-Brake.

Description: Patent for machine brake for regulating the speed of an automatic fan.
Date: December 14, 1915
Creator: Reeves, Elijah Winston
Partner: UNT Libraries Government Documents Department

Improvement in the Propulsion of Vessels.

Description: Patent for improvement in vibrating propellers with continued paddle action that can be attached to a line of boats.
Date: December 30, 1873
Creator: Macowitzky, Charles P.
Partner: UNT Libraries Government Documents Department

Improvement in Vibrating Propellers.

Description: Patent for new and useful improvement in vibrating propellers.
Date: December 22, 1874
Creator: Macowitzky, Charles P.
Partner: UNT Libraries Government Documents Department

Electric Switch

Description: Patent for an electric switch. Illustration included.
Date: December 10, 1912
Creator: Ramsay, Robert L.
Partner: UNT Libraries Government Documents Department

Blind Stop.

Description: Patent for a new and improved blind-stop. This design consists "[i]n blind-stops, the rod, consisting of two parts connected by a thin piece of metal, in combination with a blind provided with a median open-slotted tapering screw and thumb-nut" (lines 49-53).
Date: December 25, 1888
Creator: Warren, Thomas
Partner: UNT Libraries Government Documents Department

Collapsible Crate

Description: Patent for a collapsible crate. Illustration included.
Date: December 1, 1903
Creator: Orr, William H.
Partner: UNT Libraries Government Documents Department
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