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Spirometer
Patent for a spirometer. Illustartion included.
Date:
August 16, 1904
Creator:
Lyttleton, Henry Thomas
System:
The Portal to Texas History
Freight Car Door
Patent for a freight car door. Illustration included.
Date:
August 30, 1904
Creator:
Herndon, Joseph R. & Marshall, Edward S.
System:
The Portal to Texas History