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Matrix-Molding Device
Patent for improvements to matrix-molding devices, "and the object is to provide simple devices which are carried by the matrices or molding devices for forming rule retaining members which have angular grooves" (lines 14-17).
Date:
September 12, 1913
Creator:
Markwell, Andrew E.
System:
The Portal to Texas History
Concrete Construction
Patent for improved concrete construction methods for creating buildings made of or with concrete. These improvements include lighter walls with an air space that prevents dampening.
Date:
September 12, 1913
Creator:
Howard, Frances H.
System:
The Portal to Texas History