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Science on the 19th of November 1872 in history

Science
Date Text
19 Nov 1872 Adding machine
Adding machine

 Adding machine
In 1872, the first U.S. patent for an adding machine capable of printing totals and subtotals, called a "calculating machine," was issued to E.D. Barbour of Boston, Mass. However, it was not practical. (No. 133,188)
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18th November 1872 20th November 1872
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