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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
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