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Patent for an ant trap. Illustration included.

Date: April 14, 1908

Creator: Howard, Martin T.

Partner: UNT Libraries Government Documents Department

Patent for a water valve for water delivery systems that does not have standing water around it that can freeze in cold weather.

Date: April 12, 1910

Creator: Anthony, Joseph B. & Morris, Robert M.

Partner: UNT Libraries Government Documents Department

Patent for an improvement to wrenches. This wrench uses a sliding jaw system for increased utility.

Date: April 29, 1920

Creator: Grogan, Edward W.

Partner: UNT Libraries Government Documents Department

Patent for a road grader. Illustration included.

Date: April 5, 1904

Creator: Braly, Hugh L.

Partner: UNT Libraries Government Documents Department