Resource Type
Counties
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Improvement in Post-Hole Diggers
Patent for certain new and useful improvements in Post-Hole Diggers.
Date:
November 20, 1877
Creator:
Armstrong, John J.
System:
The Portal to Texas History
Plunger Head or Valve.
Patent for a plunger head or valve, which cannot come unscrewed accidentally while inside a pump.
Date:
November 23, 1909
Creator:
Shutt, John E.
System:
The Portal to Texas History