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in creator/contributor: "Trainer, J. E."

Patent for a combination lock that is able to be changed at will due to its arrangement of parts.

Date: November 24, 1903

Creator: Katzenberger, Oscar

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a permutation locking device for lockets. Illustration included.

Date: May 9, 1905

Creator: Katzenberger, Oscar

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for improvement in the safety of tie and rail-joints. Improves the connection so that independent movement of the tie and rail is reduced.

Date: November 17, 1914

Creator: Knaus, John J.

Item Type: Patent

Partner: UNT Libraries Government Documents Department