Right. As Ed recently pointed out, it's actually rare for a company to actually buy and transfer copyrights (and that's irrelevant in this case, because the copyrights didn't exist at the time of purchase), leaving only the trademarks.
The claimant, here, is Max Allen Collins (who bought "the rights" in 1987 and has reprinted and adapted the stories since), so it also doesn't have anything to do with Morisi, as it would be with Peter Cannon, for example.