This excerpt taken from the ATVI 10-K filed Jun 14, 2007.
7.10 Ownership of Original Master Discs. Due to the proprietary and confidential nature of the mastering and encryption process, neither the SCE Company nor any Designated Manufacturing Facility shall under any circumstances release any original Master Discs, reproducible masters created under section 7.3 or other in-process materials to Publisher. All such materials shall be and remain the sole property of the SCE Company or the Designated Manufacturing Facility (as applicable). Notwithstanding the foregoing, the Publisher Intellectual Property Rights contained in the Publisher Software that is contained in any such in-process materials is, as between the SCE Company and Publisher, the sole and exclusive property of Publisher or its licensors.