I hope they know Triton is a copyrighted name, why do you think CARC named their deck Titans.
Is it still protected? Anything prior to 1923 is in the public domain by now, and many things since are as well.
Did some quick research. Triton No. 42 was first printed by NY Consolidated in 1890 as an expensive brand in the "Squeezers" line. Another person, Karl Gerich d.b.a. Victoria Playing Card Co. in Bath, UK, produced a Triton No. 31 deck in 1989, but it was a real specialty project - they were printed from copperplate etchings and hand-colored, in a very old-fashioned style, and the cards are longer than poker size, without indices and with square-cut corners. It's really more of an art piece, but in the art of printing more so than the art of design.
I get the feeling that "Triton" as a deck name is free and clear.
Bill Kalush actually wanted to use the name Titans, but another deck designer beat him to the punch by a few months, so he went with Global Titans. I don't think he wanted to use the name Triton, preferring to use a name USPC hasn't.