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Calipers.
Patent for calipers that make it easier to read measurements, by having a strip of measuring tape at the ends that allows users to determine the distance between the arms easier. The measuring tape component is also retractable.
Date:
April 4, 1922
Creator:
Miller, William James
System:
The Portal to Texas History
Rice-Hulling Machine
Patent for a rice hulling machine. Illustrations included.
Date:
April 4, 1911
Creator:
Couch, Albert B.
System:
The Portal to Texas History