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Ant-Trap.

Description: Patent for certain new and useful improvements in ant-traps.
Date: April 12, 1898
Creator: Selvidge, Charles W.
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Partner: UNT Libraries Government Documents Department

Ant-Trap

Description: Patent for "a simple device of this kind which will excel the former traps in depositing the ants within the annular pan and in efficiency for convenient discharge of the trapped insects" (lines 18-22).
Date: April 2, 1901
Creator: Inman, Joseph
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Partner: UNT Libraries Government Documents Department

Antifreezing Valve and Closet-Cistern

Description: Patent for "valves which will allow all the water to flow out of the popes to a position below freezing-point after each application of water, whether the water is used in a closet-cistern or drawn out of a hudrant or other application is made, and to arrange the valves so that the supply-valves will be automatically closed by water-pressure in connection with the operation of a siphon in a closet-cistern and the waste-valve will be closed by the pressure of water, siphonic action, or both, whe… more
Date: April 23, 1901
Creator: Wilkes, George W.
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Partner: UNT Libraries Government Documents Department

Advertising-Machine

Description: Patent for an advertising machine for displaying various advertising cards in a motorized machine that displays all the different cards as it goes around in a circle.
Date: April 18, 1911
Creator: Helm, Virgil L.
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Partner: UNT Libraries Government Documents Department

Air-Brake-Setting Appliance

Description: Patent for an air brake apparatus for train cars which automatically activates when a train car is derailed. Illustrations included.
Date: April 13, 1909
Creator: Gale, Albert & Lilley, Doc M.
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Partner: UNT Libraries Government Documents Department
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