I think he's referring more to the association of the name 3AD with 1AD and 4AD, when 3AD is marketed as a prohormone.
His opinion is that AX is seeking to cash in on the successful reputation of his trademarked products.
He said what bothers him is that 3AD isn't 3-androstenedione or diol, and that the name 3AD doesn't represent the product's chemical structure, so that there would be a reason to justify calling it 3AD.
Not taking sides here, just clarifying what was said. An example he gave was that Heinz wouldn't sit by if you made a ketchup product called "58", although they wouldn't care if you made a cleaning product or something else unrelated to condiments, by the name 58.
His arguement is that 1AD and 4AD are registered trademarks, not that he owns the rights to A.D., as in "Year of Our Lord, as one previous poster mentioned as an example.