Resource Type
Counties
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
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.
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.
System:
The Portal to Texas History