"Novell has registered for the copyrights on UNIX System V 2, 3.0, 3.1, 3.2, 3.2/386, 4.0, 4.1, 4.1ES, 4.1ES/386, 4.2, and 4.2MP with the U.S. Copyright Office.
"Now both the SCO Group and Novell have registered for UNIX System V copyrights for the same code, although it appears that Novell has a few that SCO does not..."