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Underreamer.

Description: Patent for a strengthened and improved underreamer for more effective well drilling.
Date: February 15, 1921
Creator: Montgomery, Gustavus A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Abrading Element For Tire-Patch Containers

Description: Patent for an improved tool that is affixed to tire-patch containers. It is used for abrading the surface of a tire to effectively roughen it (without the use of sandpaper) to allow the adhesion of a patch. Includes illustrations.
Date: January 4, 1921
Creator: Duffy, Jesse A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Dressing Block.

Description: Patent for Dressing Block for well drilling tools. A further aim of this invention is to provide a means for adjusting the tool and the anvil so that tools of different lengths and different sizes, may be readily accommodated and properly dressed.
Date: November 8, 1921
Creator: Montgomery, Gustavus A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Shoe-Heel Holder.

Description: Patent for "the provision of means for removably holding a heel in position for attachment to a shoe...as to hold it against accidental displacement during the operation of securing it to the shoe..." (lines 10-12, 22-24). It also includes an illustration.
Date: September 13, 1921
Creator: Creed, William Thomas
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Traffic Signal System

Description: Patent for a Traffic Signal System for universal traffic management, i.e. automobiles, pedestrians, railway, street car, etc. The system has a warning signal to indicate danger and designate a safety zone. This system provides an audible as well as visual signal.
Date: July 21, 1921
Creator: Wetter, R. E.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Process and Apparatus for the Utilization of Heat in Oil-Engines.

Description: Patent for an invention that improves the utilization of waste or surplus heat of internal combustion engines, specifically oil-burning engines of the Diesel type. This invention will assist diesel engines to run satisfactorily on lower or heavier-grade engine oils. This assists in the efficiency and production of Diesel engines.
Date: June 28, 1921
Creator: Lucke, Herbert R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Fountain Brush.

Description: Patent for the improvement of fountain brushes. The brush would be in the shape of a pencil which would stop ink or dye from spreading on fabric.
Date: August 16, 1921
Creator: Bates, William P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Paving Apparatus.

Description: Patent for "a device or apparatus for transmitting the vibrations of a vibrating machine...for the purpose of solidifying the paving by driving out air and water and surplus moisture" (lines 12-18), including illustration.
Date: July 5, 1921
Creator: Stubbs, Robert C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Meat-Cutting Machine

Description: Patent for a meat-cutting machine that employs a powered knife and saw combination for the slicing of meat.
Date: September 20, 1921
Creator: Creed, William T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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