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Mold.
Patent for a new, improved Mold "specially designed for the formation of the rings of packing such as is used in stuffing boxes for packing metallic rods" (lines 11-14), illustrations included.
Date:
January 24, 1922
Creator:
Miller, Ose Z.
System:
The Portal to Texas History
Dental-Broach Holder.
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.
System:
The Portal to Texas History
Mousetrap
Patent for a mousetrap that is an improvement to the average mousetrap, but new in the sense that it can be made in various proportions or sizes for a variety of vermin.
Date:
January 24, 1922
Creator:
Spencer, Clarence E.
System:
The Portal to Texas History