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Impression Cake

Description: Patent for a new type of impression cake meant for the creation of dental and other kinds of molds.
Date: May 13, 1919
Creator: Downie, James H.
Partner: UNT Libraries Government Documents Department

Sanitary Closet

Description: Patent for "improvements on sanitary closets for destroying the human excrement-s on the premises with little labor and expense" (lines 8-11).
Date: May 13, 1890
Creator: McCamant, Theodore F.
Partner: UNT Libraries Government Documents Department

Construction of the Hulls of Concrete Ships.

Description: Patent for "new and useful improvements in Construction of the Hulls of Concrete Ships" (lines 5-6). The improvements enable concrete hulls to be made efficiently, comparatively lightweight, and durable with a new form of rib reinforcement providing strength to withstand all strains of ocean travel.
Date: May 13, 1919
Creator: Holmgreen, Julius H.
Partner: UNT Libraries Government Documents Department
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