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Tread for Pneumatic Tires.

Description: Patent for an improvement in treads for pneumatic tires "to prevent excessive wear or puncture of the parts of the tire constituting the tread portion" (lines 12-14).
Date: September 30, 1919
Creator: Twombly, Royal W.
Partner: UNT Libraries Government Documents Department

Pump.

Description: Patent for a new and improved design for pumps as they are used in deep wells. New design meant to prevent sand from entering machine between the working barrel and plunger.
Date: February 1, 1919
Creator: Carmichael, Robert E.
Partner: UNT Libraries Government Documents Department

Means for Reducing Wear in the Working Barrels of Pumps

Description: Patent for a means of reducing wear in the working barrels of pumps. The pumps made in this wat are specially adapted for operations in water or oil wells where the fluid being pumped is is mixed with sand and sediment.
Date: March 4, 1919
Creator: Carmichael, Robert E.
Partner: UNT Libraries Government Documents Department

Pipe-Wrench.

Description: Patent for the improvement of pipe wrenches necessary for use in well drilling or other circumstances where a wrench of strong construction is needed. This patent provides for a pipe wrench that can be easily adjusted to fit pipes of differing sizes and is easily manipulated for use regardless of direction.
Date: December 9, 1919
Creator: Carmichael, Robert E.
Partner: UNT Libraries Government Documents Department

Sample-Taking Device

Description: Patent for a sample taking device "for use in preserving the log of the well in drilling operations in earth, rock or other similar formations." (lines 12-14). Specially adapted for use in drilling wells for oil and sulfur, specifically in the Gulf Coast region.
Date: December 9, 1919
Creator: Carmichael, Robert E. & Hamman, George
Partner: UNT Libraries Government Documents Department

Rotary Boring Drill

Description: Patent for a rotary boring drill to be used in mining and drilling.
Date: March 4, 1919
Creator: Carmichael, R. E.
Partner: UNT Libraries Government Documents Department

Attachment for Automobile Headlights

Description: Patent for an automobile headlight attachment capable of horizontal rotation.
Date: December 2, 1919
Creator: Tripp, John C.
Partner: UNT Libraries Government Documents Department

Apparatus for Fusing Sulfer from Low Grade Ores

Description: Patent for the Apparatus for Fusing Sulfer from Low Grade Ores. This machine makes the extraction of sulfur from ores containing less than 20% sulfur, while also removing the impurities.
Date: September 16, 1919
Creator: Austin, Paul P., Jr.
Partner: UNT Libraries Government Documents Department

Apparatus for Sulfur Mining

Description: Patent for "new and useful improvement" for sulfur mining by Mr. Robert Carmichael. This device has particular application for mining in subterranean environments, "by use of pumping a heated fluid down into contact with a sulfur strata" (lines 14-15).
Date: December 9, 1919
Creator: Carmichael, Robert E.
Partner: UNT Libraries Government Documents Department
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