Patent specification number DE 19926640 C2.
Patent specification number DE 19926640 C2, english translation.
My Patent DE 19926640 is so attractive that it has been copied
:
http://www.google.com/patents?id=JwsSAAAAEBAJ&printsec=abstract&zoom=4&dq=safenet+random&ie=ISO-8859-1
Patent specification number DE 19836708 B4.
Patent specification number DE 19836708 B4, english translation.
Patent specification number 10022014.2