1.
Buffalo, New York : The Patent and Trademark Office Society, 1986.
English | 47 US |
2.
3.
München [Germany] : Mitteilungen der deutschen Patentanwälte, 1973.
German | 43 DE |
4.
[Place of publication not identified] : [publisher not identified], 1987.
English | 13 US |
5.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1980.
German | 28 DE |
6.