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in subjects: "doors"  
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Threshold

Description: Patent for an improved threshold to fit the bottom of a door more properly to "prevent the entrance of dust, wind, and rain" (lines 16-17).
Date: May 11, 1915
Creator: Krause, Ernest
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Threshold.

Description: Patent for an improvement for thresholds to consist of a single metal plate with an arched central portion and laterally-projected flanges that is cheaper and easier to make. The threshold will create a tight joint with the bottom of a door to prevent water and dust from entering through the bottom of the door.
Date: April 11, 1916
Creator: Krause, Ernest
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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