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Valve.
Patent for a valve for suction and blower conduits. This particular device is designed for use in cotton ginneries and saw mills.
Date:
March 6, 1917
Creator:
Guice, Bengamen R.
System:
The Portal to Texas History
Ventilating Apparatus.
Patent for a ventilating apparatus for railway cars for the purpose of supplying air to railway car interiors without needing to open a window (which tends to also let in smoke and dust), including illustrations.
Date:
March 6, 1906
Creator:
Parrish, Ezekiel L.
System:
The Portal to Texas History