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Wheel.
Patent for a wheel hub, which has anti friction parts inside of it.
Date:
August 23, 1910
Creator:
Neighbour, William W.
System:
The Portal to Texas History
Propeller
Patent for a boat propeller that does not create a vacuum behind it and is more efficient than other propellers.
Date:
July 23, 1912
Creator:
Blake, David H.
System:
The Portal to Texas History