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Rotary Boring-Drill.

Description: Patent for improvements to rotary boring drills.
Date: May 15, 1915
Creator: Hughes, Howard R.
Partner: UNT Libraries Government Documents Department

Attachment for Cameras.

Description: Patent for an improved camera attachment for adding titles to film that prevents the film from being exposed to light except when the title is photographed, with illustrations.
Date: May 15, 1917
Creator: Bretz, George W.
Partner: UNT Libraries Government Documents Department
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