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Windmill.
Patent for improving windmills by attaching the vanes at angles that best match the wind's direction.
Date:
February 12, 1918
Creator:
Liles, Leander W.
System:
The Portal to Texas History
Double Speed Engine
Patent for a double speed engine. Illustrations included.
Date:
July 12, 1904
Creator:
Richards, Oliver L.
System:
The Portal to Texas History