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Air-Brake Mechanism.

Description: Patent for "a new and useful air-brake mechanisms in relation to a pressure controller and distributer designed to perform the several independent and joint functions of a triple valve, a pressure-retaining valve, and a pressure relief or reducing valve."
Date: May 29, 1900
Creator: Dillander, John
Partner: UNT Libraries Government Documents Department

Animal-Trap

Description: Patent for an animal trap primarily intended for capturing rodents. Illustrations included.
Date: May 19, 1908
Creator: Pierce, William Z.
Partner: UNT Libraries Government Documents Department

Aeroplane

Description: Patent for an aeroplane that uses centrifugal blowers to ensure a safe and practicable flight. Illustrations included.
Date: May 26, 1908
Creator: Judson, Fred I.
Partner: UNT Libraries Government Documents Department

Barrel-Shelf

Description: Patent for barrel shelves which attach to barrels to hold up sacks during filling and fold up when out of use.
Date: May 4, 1909
Creator: Hughes, Alonzo
Partner: UNT Libraries Government Documents Department
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