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Aeroplane.
Patent for aeroplane construction to include improvements to air motor protection to minimize resistance and the use of air cups to direct the full force of air to the motor shaft, including illustrations.
Date:
November 15, 1921
Creator:
Smith, Joseph A.
System:
The Portal to Texas History
Broom.
Patent for a broom that has replaceable straw sections.
Date:
June 7, 1921
Creator:
Blasingame, Frank P.
System:
The Portal to Texas History
Poultry-Crate.
Patent for an improved version of the Poultry-Crate, including illustrations. This version was designed with efficiency in mind, devised to be an inexpensive and highly portable invention.
Date:
August 30, 1921
Creator:
Tucker, William
System:
The Portal to Texas History