1.
2.
München [Germany] : Mitteilungen der deutschen Patentanwälte, 1986.
German | 43 DE |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1995.
German | 28 DE |
4.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | 28 DE |