Can't find much on Plymouth with a quick search but did learn some executives wanted to name the Barracuda the Panda LOL.
I am not a lawyer but I think the rights can run out after a time.I remember that 3 or 4 years ago they did something, I think with the copyright, stopping the vendors from making anything with the Plymouth name on it.
Yep they reapply and pay a fee for a word, it's not an invention with a patentI am not a lawyer but I think the rights can run out after a time.