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Combination-Plow.

Description: Patent for a combination-plow that "may be combined with facility to form a variety of plows designed for work of different kinds, the present invention being an improvement upon that shown and described in Patent No. 492,462, granted to [the inventor] February 28, 1893" (lines 10-15).
Date: July 14, 1896
Creator: Dean, John Rowe
Partner: UNT Libraries Government Documents Department

Combined Pencil Holder and Sharpener.

Description: Patent for a combined pencil holder and sharpener, which uses the sharpener as a pencil cap.
Date: November 30, 1909
Creator: Haase, Conrad H.
Partner: UNT Libraries Government Documents Department

Apparatus for Treating Hydrocarbons.

Description: Patent for an improved apparatus for treating hydrocarbons. This apparatus is for treating comparatively heavy petroleum and other hydrocarbon oils and their distillates and derivatives, in order to produce from such heavy oils a large yield of gasoline or other light, easily volatile liquids. This apparatus will be a safe and efficient way to produce large yield of gasoline and light hydrocarbon liquids from heavy oils and will be free from trouble arising from the accumulation of carbon.
Date: August 5, 1919
Creator: Andrews, Benjamin & Averill, Willard C., Jr.
Partner: UNT Libraries Government Documents Department

Conduit Electric Railway.

Description: Patent for a surface trolley for electric railways that operates "upon the surface of the pavement or ground between the tracks of the road, for connecting the car with the motor power, in place of the trolley and over head wires now suspended upon the unsightly poles in the center or at the sides of the street, which are found to be very objectionable on account of their obstructing the passageway in the streets and upon the side walks, and the wires preventing the free movement of fire compan… more
Date: April 11, 1893
Creator: de Voe, William R.
Partner: UNT Libraries Government Documents Department

Conduit Electric Railway.

Description: Patent for an underground conduit electric railway meant to propel cars. The conduit can be drained and kept dry, and a trolley attachment protects the conduit from dirt and water as well.
Date: December 5, 1893
Creator: de Voe, William R.
Partner: UNT Libraries Government Documents Department

Combination Drill Bit and Drill Shank

Description: Patent for "Improvements in Combination Drill-Bits and Drill-Shanks" (lines 6-7) including illustrations.
Date: December 30, 1919
Creator: Humason, Granville A.
Partner: UNT Libraries Government Documents Department
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