Inventor Otis Tufts patented the first elevator in the US.
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The plastic shirt collar was patented in the US by Walter Hunt.
Thomas Edison filed his patent for the Optical Phonograph.
The pocket watch patent was awarded to Dutch mathematician and scientist Christiaan Huygens.
Barbed wire was patented by Lucien B Smith in Ohio, US.
Mary Kies became the first woman ever to acquire a patent.
