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Drafting Implement

Description: Patent for drafting implement, for laying out or plotting curves of different degrees and combining the functions of a plurality of implements into a single implement.
Date: January 3, 1922
Creator: Tanner, John L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Dental-Broach Holder.

Description: Patent for a dental broach holder that can be easily cleaned, and that includes certain structural elements that keep a dental broach more secure during use. The broach fastens on the outside of the holder, the mechanism of which "[prevents] loss of the broach in the patient's mouth during operation" (lines 92-94).
Date: January 24, 1922
Creator: Gilbert, James M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Sash Lock

Description: Patent for an improvement for window sash locks, with an improved ability to hold windows in place.
Date: January 10, 1922
Creator: Brown, John A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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