The Arithometer was invented by a Frenchman named Charles Xavier Thomas de Colmar, he patented it in 1820. He lived from 1785-1870. The large movement to produce his product was between 1851-1915.
i really dont like wikki answers cause it doesnt help with my questions
its invented., i dont know.. y are you askin' me? i think its invented some years ago., (of couse) ok!!! that's all!! thanks for reading... gosh., a person like me? askin' about a long ago things,,.. i just want you to know to study hard., and dont depend on the computer..