Punched Card Calculator Patented


January 8, 1889

Herman Hollerith is issued a US patent for his punched card calculator. 7 years later he starts a company called the Tabulating Machine Company. In 1911, this is one of 4 companies that merge to form the company that will one day be called IBM.

Punched Card Calculator Patented is original content of This Day in Tech History.

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