I actually sold it twice to two different companies. The first time was when it was just an idea and when they passed on it (but after they had given me enough money to prove it) I sold it to the second company for 100x more. At no point did I ever have to give up any equity.
The rather ironic thing is I actually came up with a much better idea [1] to solve the same problem, but I was never able to make any money from it. I am far more proud of the later idea, but it did not have the same magic.
The rather ironic thing is I actually came up with a much better idea [1] to solve the same problem, but I was never able to make any money from it. I am far more proud of the later idea, but it did not have the same magic.
1. http://www.biomedcentral.com/1471-2164/10/344