| |
|
|
|
| |
| |
| |
|
| |
|
Léon Bollée (1870-1913) was a French inventor, auto manufacturer and racing enthusiast. He began work in 1887 on three calculating machines: the Direct Multiplier, the Calculating Board and the Arithmographe. Bollée's Multiplier was the first successful direct-multiplying calculator and it won a gold medal at the 1889 Paris Exposition. Three versions of the large multiplier and several smaller machines were developed by Bollée, and the devices were patented in France, Belgium, Germany and Hungary.
|
| |
|
|
|
|
