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Lock
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
System:
The Portal to Texas History
Refrigerating Apparatus
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.
System:
The Portal to Texas History