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Wrench.

Description: Patent for a wrench which "may be efficiently employed in places which are inaccessible to the ordinary wrench."
Date: August 24, 1915
Creator: Culbertson, Charles P.
Partner: UNT Libraries Government Documents Department

Threshing-Machine.

Description: Patent for a harvester in a threshing machine, which can be put at different levels from the ground.
Date: August 31, 1909
Creator: Haynes, Thomas S.
Partner: UNT Libraries Government Documents Department

Drop Propeller for Boats

Description: Patent for a drop propeller for boats. This design is to allow boats to easily cross reefs. Illustration included.
Date: August 17, 1909
Creator: Stribling, Franklin E.
Partner: UNT Libraries Government Documents Department
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