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Hydraulic-Drill

Description: Patent for an improved hydraulic drill to penetrate and bore holes into earth, clay and similar materials, including illustrations.
Date: August 11, 1903
Creator: Higgins, Pattillo
Partner: UNT Libraries Government Documents Department

Clinical Thermometer.

Description: Patent for a new and improved thermometer. This design has "[u]pon the body of the instrument a scale, preferably equivalent to the centigrade . . . in which the zero-sign is placed at the normal temperature of the body, each degree being divided into five or ten parts according to the size of the instrument and reading supernormal and subnormal degrees" (lines 20-26).
Date: June 11, 1889
Creator: Hunstock, Robert H. & Chávez, Emigdio
Partner: UNT Libraries Government Documents Department

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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