> You may think this is no worse than not having a patent rider at all. But that's not the case. If there is no patent rider then there is an implicit grant whi

> You may think this is no worse than not having a patent rider at all. But that's not the case. If there is no patent rider then there is an implicit grant which cannot be revoked. I believe a couple of lawyers have suggested that this could, maybe, arguably be true. However, no court has ever ruled as such, and the consensus among IP lawyers is that it's an unlikely outcome. If you're worried about potential patent lawsuits, I would NOT suggest relying on the vague hope that someday a court might read an implicit patent grant into the BSD license, especially when you'll be facing off with Facebook's lawyers. Or do you have some citation for the "implicit patent grant"? In particular, a court decision finding one?