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Culvert.
Patent for metal road culvert improvements. Light weight, but sturdy, interlocking metal sheets are used. They can be stacked for cheaper and easier shipping. The culvert allows large amounts of water to flow through.
Date:
April 22, 1913
Creator:
Youngblood, David Franklin
System:
The Portal to Texas History
Curtain Stretcher
Patent for curtain stretcher or frames
Date:
April 15, 1913
Creator:
Buckreis, Valentine
System:
The Portal to Texas History
Gearing
Patent for gearing for a flying machine. This gearing will allow for two independent drive shafts to work with tow independent engines to allow both engines to connect to either or both draft shafts.
Date:
April 1, 1913
Creator:
Herrmann, Ernst W.
System:
The Portal to Texas History