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Dental-Plate-Polishing Tool.
Patent for a machine that dresses or reduces dental plates uniformly, and can dress dental plates to any thickness. It also can "provide permanently-exposed means for indicating the thickness to which the plate is being reduced" (lines 16-19). It will not puncture or weaken dental plates.
Date:
October 13, 1896
Creator:
Barnes, Preston B.
System:
The Portal to Texas History