UNT Libraries Government Documents Department - 3 Matching Results

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Sanitary Cover-Pad for Mattresses.

Description: Patent for an improvement in sanitary pad covers for mattresses that is washable and contains pocket flaps underneath that can hold a sheet of waterproof material to protect the mattress beneath.
Date: May 11, 1920
Creator: Callahan, John William & Callahan, Maud B.

Setting-Basin Separating Device

Description: Patent for Settling Basin-Separating Devices. This device improves the issue of unwanted discharge shown in prior devices
Date: May 11, 1990
Creator: Allen, Charles

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
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