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Dental Drill Attachment.

Description: Patent for a new and improved dental-drill attachment. This design consists in "the combination, with the upper pulley and the supporting pully-frame of a drill, of a rod having hinged to its upper end the clip, having the set-screw, and having at its lower end the frame, having the wheel and the side-spools journaled within it" (lines 25-31).
Date: August 13, 1889
Creator: Moyer, Jesse Hechler
Partner: UNT Libraries Government Documents Department
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