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Dental Handpiece.

Description: Patent for an improvement on a dental handpiece that is made of fewer parts and is cheaper to make. It makes insertion and removal of the drill easier, and keeps the drill in place more securely.
Date: August 17, 1920
Creator: Graves, Robert E.
Partner: UNT Libraries Government Documents Department

Float-Valve.

Description: Patent for a float valve not using slots and links, including illustrations.
Date: August 17, 1915
Creator: Garrott, John Collier
Partner: UNT Libraries Government Documents Department

Flexible Metallic Hose

Description: Patent for a flexible metallic hose. Illustration included.
Date: August 17, 1909
Creator: Schulz, Wilhelm
Partner: UNT Libraries Government Documents Department

Bedstead Lock or Joint

Description: Patent for a bedstead lock or joint. Illustration included.
Date: August 17, 1901
Creator: Martin, Mack D.
Partner: UNT Libraries Government Documents Department

Automatic Railroad-Switch

Description: Patent for an automatic railroad switch which throws the switch automatically back to the main line after a train has entered a siding.
Date: August 17, 1909
Creator: Toullerton, George Edward
Partner: UNT Libraries Government Documents Department
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