Copyright is a legitimate issue. That pertains tot he box art for PF. They had a copyright, all rights reserved to themselves. The used NGC's trademark on the box, however. Their blanket copyright in effect stole the trademark.
They were now FUBAR and had to do whatever NGC asked.
You are allowed to use another company's trademark on a package as long as it is clear you are not pretending to be the actual product, period. No permission is needed.
I can make a lens and put "Works with Canon™ DSLRs" on the box art. No perms needed as long as I properly denote the Canon brand name.
The only possible issue is intellectual property which is not related to © or ™.
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