American inventor Theophilus Van Kannel was granted the patent for the revolving door.
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German inventor Ferdinand von Zeppelin granted a patent for the navigable balloon.
George Bruce received the first US design patents for typefaces and bordering.
Henry W. Seely patented the electric iron in the US.
Benjamin Franklin announced his invention of bifocal eyeglasses.
George Selden filed for the first patent for a gasoline-driven automobile.
