Has there ever been a case in which a free software project trademarked a term entirely for defensive purpose and then released all exclusivity via a license?
For example if the term JavaScript were trademarked prior to Oracle's claim, and then released for all to use. The closest seems to be Linux, however even such a term will require a sublicense for several types of use, for example Debian does not use it, however Arch Linux does (assuming with a sublicense).