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Schramm, R.: Patentinformation (1997)
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Schramm, R.: Patentinformation (2004)
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Geiß, D.: Neues aus der Patentinformation (1999)
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STN baut Patentinformation aus (2004)
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Geiß, D.: Arbeitssitzung des Arbeitskreises für Patentinformation : Teil 1 (2001)
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