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in creator/contributor: "Katzenberger, Oscar"  
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Lock

Description: 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: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

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

Lock

Description: Patent for "certain new and useful Improvements in Locks." (Lines 5-6) including illustrations.
Date: February 18, 1902
Creator: Johnson, William W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. This invention is a design of door lock that uses a key and combination. Illustration included.
Date: February 12, 1907
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a keyless combination lock, including illustrations.
Date: July 23, 1901
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lock

Description: Patent for a lock. Illustration included.
Date: November 6, 1906
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Lock.

Description: Patent for a new and useful improvement in locks, including instructions and illustrations.
Date: May 30, 1899
Creator: Katzenberger, Oscar
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

Fare-Box.

Description: Patent for a fare-box for cars and other vehicles that allows the driver or conductor to set the fare and which registers the amount paid. Includes instructions and illustrations.
Date: April 20, 1897
Creator: Katzenberger, Oscar
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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