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Improvements in Expanding Mandrels.

Description: Patent for improvements in expanding mandrels by way of an expanding-chuck.
Date: January 23, 1872
Creator: Simons, John
Partner: UNT Libraries Government Documents Department

Improvement in Vapor-Burners.

Description: Patent for an improvement in vapor burners used in self-generating gas burners.
Date: June 23, 1874
Creator: Sawyer, Frederick A.
Partner: UNT Libraries Government Documents Department

Improvement in Devices for Transmitting Rotary Motion.

Description: Patent for an improvement to devices that transmit rotary motion from one shaft to another. It is comprised of a wheel on a rotary shaft that has has a groove that grips an angular nut mounted on a shaft.
Date: December 23, 1879
Creator: Howe, Milton G.
Partner: UNT Libraries Government Documents Department

Improvement in Devices for Attaching Napkins to the Person

Description: Patent for the improvement of attaching napkins to people in which a flexible ring is ensleeved with a napkins and stretched around the neck of a person.
Date: May 23, 1871
Creator: Raiford, Philip H.
Partner: UNT Libraries Government Documents Department

Improvement in Preparations of Chewing-Gum.

Description: The production of chewing-gum will become much simpler with the improved patent of chewing-gum.
Date: June 23, 1877
Creator: Cotter, Robert
Partner: UNT Libraries Government Documents Department
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