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Key.

Description: Patent for a key, which can be produced in quantity but without any of them being able to open the same door.
Date: February 4, 1908
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Milking Apparatus

Description: Patent for a milking apparatus. This invention is designed to imitate the action of hand milking or a calf's sucking. Illustration included.
Date: August 4, 1908
Creator: Sinclair, William
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Padlock.

Description: Patent for a padlock, which can only be opened with a certain key and prevents the use of many lock-picking devices.
Date: February 4, 1908
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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