 | This article needs additional citations for verification. (February 2016) |
The Hansen Writing Ball is an early typewriter. It was invented in 1865 and patented and put into production in 1870, and was the first commercially produced typewriter.
| This article needs additional citations for verification. (February 2016) |
The Hansen Writing Ball is an early typewriter. It was invented in 1865 and patented and put into production in 1870, and was the first commercially produced typewriter.