I wouldn't really see it as an innovation blocker in that case just because someone is dominant. Or, if we really indulge in this wider sense, a lot of companies would block innovation too. Amazon as a whole for example, so I cannot really make the connection to the license.
You could of course argue that because air is free, it stops innovation in the air trade. But in the end that doesn't end in a sensible argument.
You could of course argue that because air is free, it stops innovation in the air trade. But in the end that doesn't end in a sensible argument.