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Aeroplane
Patent for an aeroplane that will maintain its balance in the air automatically
Date:
December 5, 1911
Creator:
McManus, Augustus F. W.
System:
The Portal to Texas History
Spring-Washer for Piano-Flanges.
Patent for a spring washer for piano flanges that prevents the flanges from becoming loose over time.
Date:
December 5, 1911
Creator:
Mayor, Enoch Allen
System:
The Portal to Texas History