To my knowledge (and I've checked) there is no online information on the exact details of the case.
Neither of the parties seems interested in discussing it either, so it's a bit of a black hole.
What is know is the following.....
There has been a case in a European trade court for several years over the right for Phase One (and others) to mount their backs on Hasselblad H1 and H2 cameras. The argument, as I understand it, was that Phase One worked with Hasselblad on the engineering of the digital interface to the H1 camera system and as a result received a royalty free right to sell backs that attached to it.
Hasselblad then closed their system and would not allow other manufacturers to sell backs that attached. (They changed the model number, claiming it was a new camera, and therefore Phase One's right to interface no longer applied).
I may have the fine details off a bit, but those are the broad strokes and are well known to people in the industy.
My understanding is the the courts ruled recently that Phase did indeed have the right to attach to Hasselblad H1 and H2 cameras (H3 and onwards looks like it's still problematic) and Leaf (as announced in todays video with Yair Shahar, Leaf's Product Manager, is now shipping their Aptus II 12 80MP in that mount.
I openly invite representatives of both companies to provide further details or elaboration on this matter. I have no interest in name calling or finger pointing. But, unless someone with knowledge of the matter comes forward all we'll have is supposition.
Michael