Exhibits At the Museum

This Day in History

      January 2016
     12
3456789
10111213141516
17181920212223
24252627282930
31      
Today: July 27, 2016

January 13, 1874

The US Patent Office Issues a Patent for the Spalding Adding Machine

The US Patent Office issues a patent for the Spalding Adding Machine. The precursor of calculators and computers, mechanical adding machines could do simple arithmetic and were popular in businesses until supplanted by computers in the 1960s.