I don't know who to contact. It is not difficult to file a trademark application. A trademark once registered has broad, enforceable rights in 50 States. The more a trademark is used the greated its value.
Trademarks are good as long as they are used, and can be made incontestable.
Certain legal rituals must be followed to maintain their rights. We were once invoved with the trademark Jean Marie Farina for a cologne. I have some in my medicine cabinet. The mark is entering its third century. If the mark is used or plans are made to use the mark, time and money have to be lavishly spent.