Found on the Mirrorless Rumors site. Sketch of a
Nikon design for providing NF-mount compatability
with a Nikon FF live-view body. Essentially same as
a Sony LA-EA4 providing A-mount compatability on
an E-mount body.
I doubt there's any patent problem here. Both Sony
and Nikon are simply taking their own existing SLR
AF mechanism and stuffing it into a short tube with
an SLR front flange plus a live view rear flange on
its front and rear ends, all just existing mechanisms
in a new can. Doesn't smell like infringement to me,
not that I'm edumacated about that ....