it appears to me that as of Assignment 5, the assignment of interest to Daic and Williamson (25%)(assignment 3) and the mortgage and security agreement to Daic/Williamson (assignment 4) was terminated--leaving Calypso as the patent owner...
subsequently, via assignment 6, Calypso assigned a security interest to Daic/Williamson which they then assigned to Kelly Stephens (assignment 7)...
and lastly, via assignment 8, Calypso assigned a partial interest to Daic/Williamson in the TMobile case...
soooooooooooooooo...IMO
Calypso owns the patent
Daic/Williamson had a security interest(as a creditor of some sort) which they assigned to Stephens
Daic/Williamson have a partial assignment in the TMobile case...
kinda hard without seeing the documents---and I may be completely FOS :-)
ps..here's the other patents including the Baxter assignments and the satellite (7546141)