American inventor Eli Whitney was granted a patent for a ground-breaking new type of cotton gin.
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Anne Miller became the first American patient to be treated with penicillin.
Google employee Emma Haruka Iwao broke a world record by calculating Pi right down to 31.4 trillion digits!
German inventor Ferdinand von Zeppelin granted a patent for the navigable balloon.
US President John F. Kennedy's body was moved to its final resting place in Virginia.
President Warren G. Harding became the first president to pay taxes in the US.
