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1.	Neue Gestaltung der Patentanmeldung / Carl Otto Niessen. Niessen, Carl Otto, author. München [Germany] : Mitteilungen der deutschen Patentanwälte, 1975. German \| 43 DE \| Detailed record - Similar records
2.	Rationalisierung der Patentrecherche / Carl Otto Niessen. Niessen, Carl Otto, author. München [Germany] : Mitteilungen der deutschen Patentanwälte, 1977. German \| 43 DE \| Detailed record - Similar records

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