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Sanitary Cover-Pad for Mattresses.
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.
System:
The Portal to Texas History
Process of Vaporizing Liquids and Apparatus Used in Connection Therewith.
Patent for improvements in vaporizing liquids referring to a processing a liquid such as gasoline or kerosene and properly mixing it with air.
Date:
May 25, 1920
Creator:
McClinktock, Charles David
System:
The Portal to Texas History
Silo-Door.
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.
System:
The Portal to Texas History