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Hairpin

Description: Patent for preventing "the accidental displacement of the dislodgment of the pin from the hair of the wearer." (Lines 11-12).
Date: September 11, 1919
Creator: Nalle, Charles R. of Forth Worth, TX
Partner: UNT Libraries Government Documents Department

Involuting Drawing Instrument

Description: Patent for drawing instrument intended for drawing involuting curves. Includes illustration and instructions.
Date: August 11, 1914
Creator: McCaskill, Oscar E.
Partner: UNT Libraries Government Documents Department

Well Drilling Bit

Description: Patent for a well drilling bit. Illustration included.
Date: February 11, 1913
Creator: Byron, Marcus A. & English, Harry White
Partner: UNT Libraries Government Documents Department

Liquid-Fuel Burner

Description: Patent for a fuel burner for stoves and heaters. Illustrations included.
Date: April 11, 1911
Creator: Pearson, Lemuel O.
Partner: UNT Libraries Government Documents Department

Post Card

Description: Patent for a post card. Illustration included.
Date: October 11, 1910
Creator: Graham, Tilghman
Partner: UNT Libraries Government Documents Department

Double-Acting Pump-Jack

Description: Patent for a double acting pump jack for artesian wells.
Date: June 11, 1912
Creator: Pittman, William T.
Partner: UNT Libraries Government Documents Department

Silo.

Description: Patent for a new silo design made of hollow tiles "to provide dead-air spaces within the tile, for the purpose of preventing the rapid passing of heat or cold through the tile" (lines 13-16) including instructions and illustrations.
Date: August 11, 1914
Creator: Sellors, Edward M.
Partner: UNT Libraries Government Documents Department

Crude Oil Refining Process

Description: Patent for the refinement of crude oil, producing refined oil in an economic manor.
Date: November 11, 1919
Creator: Evens, Jewett G. P.
Partner: UNT Libraries Government Documents Department
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