The Ravens want to own "Charm City"? That's Cafe Hon level abuse of trademarks.
Patent Office initially rejects Ravens’ attempt to trademark ‘Charm City’
https://www.thebaltimorebanner.com/community/local-news/us-patent-and-trademark-office-offers-initial-rejection-of-baltimore-ravens-attempt-to-trademark-charm-city-OQ6QPAAT4VAOXIQNRU2XGNUGCA/