This deck is a remake of an old vintage deck that he bought from Tom and Judy Dawson. You may know Tom Dawson, he is the author The Playing Card Encyclopedia.
I know them - actually met them at their home in Toronto. Very nice people, the both of them. Bill recently purchased some items from Tom, so I'm guessing this was among them. Most of the decks he's made are remakes of classics in some way or another.
Any deck initially created prior to 1923 in the US would be in the public domain today in regards to copyright, leaving only trademark law to protect it - and a trademark left out of the public eye for too long a time doesn't have much of a leg to stand on, especially when it's a long-defunct brand name. This leave Bill or anyone else free to republish the oldest USPC designs, should they choose to do so. The only reason he didn't name his previous deck simply "Titans" was that another deck recently came out using the same name.
Now as far as the whole De'vo vs. CARC thing with this deck's name, well - I have no idea how a legal challenge would shake out, and I'm betting neither company wants to mess with it. De'vo could try to argue that it's his "Signature Series Exquisite" deck, and maybe that would work, I don't know. (That
is what he's calling it, right? The Signature Series?)