Does your law office advertise a slogan or vanity phone number on your website or advertising? If you haven’t trademarked it, you might be in for an unpleasant surprise.
I once put “No Fee Guarantee” on my law firm website. Sometime later, I received a letter advising that it was trademarked and that I would have to remove it. Since it was only on my website and not on billboards and TV advertising, it was easy to remove.