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Composition of Matter for Saving Coal During Combustion.

Description: Patent for cheap, effective compound to sprinkle on coal to render it more combustible so that it burns more cleanly and soot is not emitted.
Date: June 11, 1895
Creator: Stokey, David Gray
Partner: UNT Libraries Government Documents Department

Armored Car.

Description: Patent for an armored car or portable fort, that aims to provide a novel and improved armor unit of that nature.
Date: December 11, 1917
Creator: Spence, John J.
Partner: UNT Libraries Government Documents Department

Anti-Freezing Tank Valve.

Description: Patent for a new and improved tank valve. This design consists in "[t]he combination, with the tank, its valve and lever, and valve-rod, of the frost-chamber having an annular space to receive the non-freezing compound, the stuffing-box around the rod and screw-threaded at the ends, and the screw-threaded caps . . . having necks and flanges" (lines 7-13).
Date: June 11, 1889
Creator: Barrett, William Henry
Partner: UNT Libraries Government Documents Department

Aeroplane

Description: Patent for an aeroplane. Illustrations included.
Date: February 11, 1913
Creator: Goodrich, Luman L., Jr.
Partner: UNT Libraries Government Documents Department

Adjustable Window-Scaffold

Description: Patent for an adjustable window scaffold. Illustrations included.
Date: April 11, 1911
Creator: Wright, Scott W.
Partner: UNT Libraries Government Documents Department

Advertising Street Car Sign

Description: Patent for an advertisement sign located on the top of street cars. Illustration included.
Date: February 11, 1908
Creator: King, Alphonse
Partner: UNT Libraries Government Documents Department
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