Because sometimes you have a really good idea, and the ability to make it on a small scale, but you need help getting it perfect and making it big. In such a c

Because sometimes you have a really good idea, and the ability to make it on a small scale, but you need help getting it perfect and making it big. In such a case, it's often advantageous to join up with someone else, get investments, start a company, and sell your patents to that company. That's just one way the ability to sell patents is a good thing.