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Indexing Device.

Description: Patent for an indexer of paper documents in book form. It is made to open along the center with visible subject headings.
Date: January 18, 1921
Creator: Moran, Stanley C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Irrigator

Description: Patent for an irrigator used to treat piles (hemorrhoids) and similar diseases. A nozzle delivers liquid to wash the surface of the mucus coating of the afflicted area, and then drains the liquid without obstructing the flow of the liquid. Patent includes illustrations.
Date: January 18, 1921
Creator: Phillips, Edwin R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Snap Fastener

Description: Patent for a snap fastener for fastening snap buttons, hooks, and eyes. Intended to replace the need for sewing fasteners onto garments, particularly women's dresses
Date: January 18, 1921
Creator: Warrington, Samuel W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Aeroplane-Tail.

Description: Patent for improvements to the tail of aeroplanes. This invention is to be used to help control the flight of planes or heavy projectiles, and would not have effects on the equilibrium or be difficult to use.
Date: January 18, 1921
Creator: Krowka, Joseph M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Pump-Valve

Description: Patent for improvements in a pump valve. Designed to be used in pumping wells, particularly oil wells (Line 11).
Date: January 18, 1921
Creator: Sandlin, James W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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