TL; DR: the CC0 license explicitly says that it's granting only use and redistribution in a copyright sense, and not granting any patent or trademark rights.
This is different from a truly free license like BSD or MIT which grant unlimited redistribution and use.
> SPDX-License-Identifier: CC0-1.0
Do not use this bone-headed license.
The Fedora people have identified a problem with it.
https://lists.fedoraproject.org/archives/list/legal@lists.fe...
TL; DR: the CC0 license explicitly says that it's granting only use and redistribution in a copyright sense, and not granting any patent or trademark rights.
This is different from a truly free license like BSD or MIT which grant unlimited redistribution and use.