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3/27/2022 03:33:00 PM
So let's just get some facts here since you did use the vacuum cleaner. There were numerous people who invented early forms that didn't make any money despite moving the idea forward. The guy who finally did make the commercially successful one, (Spangler) ran out of financing and had to sell his patent to a person by the name of Hoover. Hoover let Spangler stay on at the company making a tiny fraction of what his devices were worth. Spangler died and his family stopped receiving any royalties 10 years later. Meanwhile the Hoover estate was worth at least 40 mil by the 80s. So yeah, thanks for proving the point.