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Power-Hammer.

Description: Patent for a power hammer that can utilize any power source and only needs one person to operate it. The design also uses less parts, making it more affordable.
Date: December 13, 1921
Creator: Karlson, Eric Fritjof
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Mold.

Description: 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.
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Partner: UNT Libraries Government Documents Department
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