Imagine a typewriter that doesn’t allow you to see what you’re typing. This was in fact the case with the very first mass-produced typewriters of the 1870s: they printed upside down, so that you had to remove the finished page from the bottom of the machine to see what you had written. It was a Canadian, Edward Horton of Toronto, who in 1884 invented the front-stroke typewriter with angled type bars that allowed writers to read what they typed. [Via.](https://www.collectionscanada.gc.ca/innovations/023020-2340-e.html)