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4 Matching Results
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Ant Trap
Patent for an ant trap. Illustration included.
Date:
April 14, 1908
Creator:
Howard, Martin T.
System:
The Portal to Texas History
Road Grader
Patent for a road grader. Illustration included.
Date:
April 5, 1904
Creator:
Braly, Hugh L.
System:
The Portal to Texas History
Water-Valve.
Patent for a water valve for water delivery systems that does not have standing water around it that can freeze in cold weather.
Date:
April 12, 1910
Creator:
Anthony, Joseph B. & Morris, Robert M.
System:
The Portal to Texas History
Wrench
Patent for an improvement to wrenches. This wrench uses a sliding jaw system for increased utility.
Date:
April 29, 1920
Creator:
Grogan, Edward W.
System:
The Portal to Texas History