Again, I think your assigning too much to IP rights, or I should say, "copyright", as "trademark" is also intellectual property.
(If links do not work, you must manually search for it here: linky)
HG's US trademark on Macross goods
HG's US trademark on Macross toys (renewal)
HG's US trademark on Macross media
HG's US trademark on Macross media distribution
HG's US trademark on Macross printed media and toys
What Are Patents, Trademarks, Servicemarks, and Copyrights?
Unfortunately, it doesn't just apply to merchandise from "Macross Saga". It applies to The Super Dimension Fortress Macross.