Maiden Japan, which I believe is a label associated with Sentai.
Yep, pretty much. It's technically another company under the holding company Section23, which has Sentai Filmworks, Maiden Japan, Aesir Holdings (who releases some old, retained ADV licenses) and the ADV Films label (which they had to put on the Elfen Lied BD, for some reason). I think the person who runs Maiden Japan is someone who was high up in ADV, Matt Greenfield.
Section23 does all their disc authoring themselves, so Maiden Japan discs are a lot like Sentai ones. Same subtitle style, same concerns, etc. Though the Maiden Japan BDs I do own (Oshii's Patlabor OVA, Patlabor 1 and 2) are actually very good.
In any case, it's great that Denno Coil has finally been licensed over here! Fantastic little series, I'll be more than happy to rewatch it on BD.
Also, Sentai is putting out And Yet the Town Moves on BD, for those of you who are interested (I know there's quite a few fans of it here. I ought to rewatch that as well, honestly).