UNT Libraries Government Documents Department - 6 Matching Results

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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

Refrigerating Apparatus

Description: Patent for a refrigerating apparatus. This invention is a coil composed of two pipes of different diameters placed inside of each other acting as a condensing agent. Illustration included.
Date: February 12, 1907
Creator: Holdgreen, Julius H.
Item Type: Refine your search to only Patent
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