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Patent for a nut lock. Illustrations included.

Date: May 21, 1912

Creator: Lance, Andrew M.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a pump jack for operating the oil well pump rods.

Date: April 23, 1912

Creator: Seybert, Guy W.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a fire and burglar alarm for use in buildings.

Date: February 13, 1912

Creator: Gregory, Marshall J.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a wheel supported by spring spokes. Illustrations included.

Date: September 24, 1912

Creator: Hudson, Alexander S.

Item Type: Patent

Partner: UNT Libraries Government Documents Department