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  1. Hammer, T.: DEPATIS und Internet, neue Wege in der Patentinformation (1998) 6.68 
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  2. Schramm, R.; Höhne, M.: Patentdatenbanken und Patentlieferdienst im Internet : Thüringer Patentnetz versorgt die Industrie (2000) 6.68 
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  3. cri: Patentschau via Internet : Münchner Amt startet kostenlosen Informationsdienst (2001) 6.68 
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