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Automatic Air Controlling Device
Patent for an air controlling device that supplies air at a constant and unvarying pressure.
Date:
February 22, 1916
Creator:
Crotto, Frank E.
System:
The Portal to Texas History
Stamp-vending Machine
Patent for Stamp-vending Machine
Date:
August 22, 1916
Creator:
Woodward, Charles H
System:
The Portal to Texas History