Resource Type
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Pump Plunger.
Patent for pump plungers usable in deep wells for either oil or water. It is designed to be used for long periods without wear and tear.
Date:
August 8, 1922
Creator:
Livergood, Gerald R.
System:
The Portal to Texas History
Detachable Washer
Patent for a detachable Washer which can be applied or removed from a bolt, without having to remove the bolt itself.
Date:
August 8, 1922
Creator:
Dubbs, Sylvester S.
System:
The Portal to Texas History