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Patent for an improved bolt block that maintains a bolt effectively against axial rotation.

Date: March 23, 1915

Creator: Robinson, Robert John, Sr.

Partner: UNT Libraries Government Documents Department

Patent for a cultivator designed to "regulate the pitch at which the sweep blades enter the ground" (lines 13-15). Illustrations included.

Date: March 22, 1910

Creator: Hewitt, John Henry

Partner: UNT Libraries Government Documents Department

Patent for a plow attachment which allows for more control in regard to how deep the plow digs.

Date: March 15, 1916

Creator: Polasek, John

Partner: UNT Libraries Government Documents Department