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Window Attachment.

Description: Patent for a sash attachment that steadies the movement of the window sash within a window frame and prevent rattling.
Date: May 4, 1920
Creator: Dysart, Marby P.
Partner: UNT Libraries Government Documents Department

Silo-Door.

Description: Patent for a door for silos that is inexpensive and "comprises part of a ladder includes in a chute held in a position upon the silo by the door." (lines 16-18)
Date: May 25, 1920
Creator: Atkins, Thomas, B.
Partner: UNT Libraries Government Documents Department

Cylindrical Structure

Description: Patent for improvements for hollow structures of cylindrical shape that provides "for formation of such a structure of lumber and metal materials of standard dimensions and shapes that ordinarily can be obtained from commercial stocks, so that the minimum amount of shop work on materials will be required." (lines 18-22)
Date: May 11, 1920
Creator: Pearson, Terrell Brooks
Partner: UNT Libraries Government Documents Department
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