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Geometrical Instrument

Description: Patent for a geometrical instrument. This instrument is used to create a straight edge with pivoted blades, like a protractor, to be used for laying protracted angles, etc.
Date: March 26, 1918
Creator: Anderson, Andrew E.
Partner: UNT Libraries Government Documents Department

Oil-Separator.

Description: Patent for the invention of a new oil separator with all its descriptions.
Date: March 12, 1912
Creator: Latham, Reginald W.
Partner: UNT Libraries Government Documents Department
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