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Combined Ruler and Blotter
Patent for a ruler that can also be used as a blotter. Illustrations included.
Date:
July 25, 1911
Creator:
Muller, Frederick William, Jr.
System:
The Portal to Texas History
Railroad Tie
Patent for a railroad tie. This invention is made of concrete and allows rails to be attached without the need of spikes. Illustration included.
Date:
July 25, 1905
Creator:
Percival, Herbert E. & Key, Brewer W.
System:
The Portal to Texas History