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Pump-Plunger
Patent for a pump-plunger, concentrating on advancements in the design, particularly catering to deep well operations and environments with challenging conditions, such as oil and water wells where fluids are mixed with sand, sediment, or debris.
Date:
October 18, 1921
Creator:
Miller, Frank J.
System:
The Portal to Texas History
Crossing-Gate.
Patent for improvements to crossing gates through a device that helps facilitate the gates' automatic closing and opening position.
Date:
September 18, 1917
Creator:
Hood, Lemuel L.
System:
The Portal to Texas History
Counter.
Patent for improvements to store counters that can be easily constructed in whatever form fits the user.
Date:
July 18, 1922
Creator:
Jones, Laurence E.
System:
The Portal to Texas History