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Occurrence, Availability, and Chemical Quality of Ground Water in the Edwards Plateau Region of Texas
Report on
Date:
July 1979
Creator:
Walker, Loyd E.
Object Type:
Report
System:
The Portal to Texas History
Wood Rod Elevator
Patent for an improvement to rod lifters that prevents the rotation of the rods as well as locking jaws into their gripper positions. The locking and gripping is made more efficient and can release rods quickly.
Date:
July 27, 1920
Creator:
Davis, George F.
Object Type:
Patent
System:
The Portal to Texas History
Trough-Valve
Patent for an automatic float valve used in water troughs. Illustrations included.
Date:
July 6, 1909
Creator:
Mauldin, Blake I.
Object Type:
Patent
System:
The Portal to Texas History