Licensing   Pardon me but MP is already public domain  It is a file format  You cannot patent a file format as far as i know  that would be like Adobe saying they have a patent on PDF or Microsoft saying they have a patent on WMA or DOC files  You simply cannot patent or copyright or in any other way protect your idea if it involves a format of storing data  Just as you cannot patent things like NTFS or FAT or HFS you cannot patent MP