Ohio became the 17th state to join the United States of America.
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Barbed wire was patented by Lucien B Smith in Ohio, US.
The first traffic lights in the US were installed in Cleveland, Ohio.
Cleveland, Ohio, recorded its coldest March temperature at a bone-chilling -5°F.
Ohio State University's Big Ear radio telescope detected a deep-space radio signal.
The world's first rock and roll concert is held in Cleveland, Ohio.
