Iowa History

Typewriter Created by Iowan Receives Rave Reviews at 1893 Chicago World Fair

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Some called it the fastest and best typewriting machine in the world. It was destined to revolutionize the business world. What was this marvelous invention that everyone was talking about in 1893? It was a duplex typewriter invented and patented by Iowan Adolphus S. Dennis, a former teacher at the Commercial College in Iowa City. Iowa History, a weekly column, appears at IowaWatch on Saturdays.