Have you trademarked your shop's slogan?

This digital stuff moves fast, even the catchphrases. That’s why it’s important to stake your claims. I got an e-mail from R/GA that included something unusual. Its standard phrase introducing the shop as "R/GA, the agency for the digital age" suddenly­ included a trademark symbol on the end of it. It turns out R/GA trademarked the phrase "the agency for the digital age" earlier this year. In fact, I was wondering which agency was the one for the digital age.