I find this interesting...
"Novell sold it to the Santa Cruz Operation in 1995, which passed it to Caldera in 2002. At that point, Caldera changed its name to SCO and stopped selling its own version of Linux."
I mainly find it interesting because the president of Novell has stated that THEY own the patents and Copyrights to AT&T Unix system V, and never transferred the ownership to Caldera with the assets sale. The president went on to say that SCO is well aware of this because over the past few months, SCO has been repeatedly contacting Novell, requesting that such IP ownership be transferred in order to give their claims some legitimacy. A request which Novell has repeatedly denied.
http://www.novell.com/news/press/archive/2003/05/pr03033.html