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Equalizing Device for Pump-Rods.
Patent for an improved equalizing device for pump-rods used in hand or windmill pumps that increases the operating efficiency and decreases the manufacture cost of the device.
Date:
April 10, 1906
Creator:
Shipman, John Davis
System:
The Portal to Texas History
Wheel
Patent for a vehicle wheel with a rigid frame and a hub that has radical range of motion.
Date:
April 7, 1903
Creator:
Lasswell, William H.
System:
The Portal to Texas History