SD

Siegfried Drews

RN Rooperol (Na) Nv: 2 patents #1 of 9Top 15%
📍 Pietermaritzburg, ZA: #3 of 27 inventorsTop 15%
Overall (All Time): #2,315,881 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5008471 Process for the preparation of rooperol George L. Wenteler, Karl H. Pegel, Hans Kundig 1991-04-16
4956502 Process for the preparation of rooperol derivative George L. Wenteler, Karl H. Regel, Hans Kundig 1990-09-11