Resource Type
Counties
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Automatic Valve
Patent for an automatic valve that uses a lever to open and close quickly, with illustrations.
Date:
November 20, 1906
Creator:
Pinkerton, Henry S.
System:
The Portal to Texas History
Post Hole Digger
Patent for a post hole digger with an illustration.
Date:
November 13, 1906
Creator:
Wall, William J.
System:
The Portal to Texas History