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Measuring Instrument.
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
System:
The Portal to Texas History
Railway-Switch Operating Means.
Patent for switching the line on a railway track including an example and illustration.
Date:
October 21, 1912
Creator:
Phillips, Carroll
System:
The Portal to Texas History