I found this little tidbit of information pretty interesting.
Apparently James Dyson developed his dual cyclone technology over the course of 5 years in his garage. He did this because of frustration with other vacuums he had used. Dyson started out as a consumer of vacuums, and had thoughts that there must be a better way to design vacuums. So he created the bagless technology used in the Dyson vacuums today.
How many prototypes did he make to create his technology? Around 5,000. I haven’t been able to verify the exact number from multiple sources, but this article states that he made 5,127 prototypes.
That’s a lot of dedication to solving a small problem of clogged vacuum bags. But it’s payed off for James greatly, as his vacuums are wildly popular.