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Patent for an improved oil well digging machine.

Date: December 1, 1908

Creator: Clack, Judge H.

Partner: UNT Libraries Government Documents Department

Patent for a safety clamp for spectacle cases and other small items, which holds the item in clothes pockets through the attachment of a clamp.

Date: February 1, 1910

Creator: Trulove, James W.

Partner: UNT Libraries Government Documents Department

Patent for a cultivator foot that allows shovels or sweep blades to be quickly attached to it or detached from it.

Date: June 1, 1915

Creator: Vance, Caughey C.

Partner: UNT Libraries Government Documents Department