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Measuring Instrument.

Description: Patent for a measuring instrument that can be used as a protractor, compass, square, level, and bevel.
Date: October 5, 1909
Creator: Phenix, William Preston
Partner: UNT Libraries Government Documents Department

Railway-Switch Operating Means.

Description: Patent for switching the line on a railway track including an example and illustration.
Date: October 21, 1912
Creator: Phillips, Carroll
Partner: UNT Libraries Government Documents Department
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