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Volker Koppenhagen

Overall (All Time): #2,363,951 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4407947 Process for obtaining metal-free corrinoids Gerhard Schlingmann, Bernd Dresow, Ludwig Bischoff, Rosemarie Penkert, Eicke Siefert 1983-10-04
4311643 Process for producing metal corrinoids Gerhard Schlingmann, Bernd Dresow, Ortrud Ebelmann 1982-01-19