Comment Re:Trust but verify (Score 5, Informative) 211
If I were personally going to use one of Tesla's patents in my business, I'd want a signed zero-cost GPL-like license agreement with Tesla. For example, Musk's good will is nice, but what if someone else were to acquire Tesla's IP?
It wouldn't matter, I don't think. A clearer statement than "we took our plaques off our wall" is needed, but assuming there is a clear statement from Tesla that they will only use these patents defensively, anyone who takes them at their word should be safe.
Why? There's a legal concept called "promissory estoppel". In a nutshell, it means that if I make you a promise and you, in good faith, depend upon that promise and build your business on it, and I knew or should have known that you were going to do so, then I can't later change my mind, withdraw my promise and sue you for doing what I said you could do.