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Patent for "improvements in drafting instruments and has particular application to a protractor or plotter." (lines 8-10)

Date: December 23, 1913

Creator: Ward, Walter P.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a porous pipe and a method of manufacturing it for use in subsoil irrigation.

Date: August 23, 1910

Creator: Ziller, Robert L.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a diffusion block for subsoil irrigation, which prevents roots from growing into the pipe that is providing water to the soil.

Date: August 23, 1910

Creator: Ziller, Bessie

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a shutter slat fastener. Illustration included.

Date: May 23, 1911

Creator: Basnett, Augustus

Item Type: Patent

Partner: UNT Libraries Government Documents Department