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Signal Apparatus for Motor-Vehicles
Patent for automobile signaling apparatus. The apparatus is designed to signal the operator's direction to other drivers.
Date:
September 17, 1918
Creator:
Riggs, Fletcher S.
System:
The Portal to Texas History
Concrete Composition
Patent for a formulation of waterproof concrete that utilizes lava rocks.
Date:
December 17, 1918
Creator:
Charles E. Barglebaugh
System:
The Portal to Texas History