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Valve for Engines.
Patent for an improved and cheaper valve for steam engines.
Date:
January 26, 1909
Creator:
Hopper, James F.
System:
The Portal to Texas History
Cotton-Gin
Patent for a cotton gin which removes lint with air pressure. Illustrations included.
Date:
January 26, 1909
Creator:
Epps, Clinton Calvin
System:
The Portal to Texas History