SD

Siegfried Drewes

RN Rooperol (Na) Nv: 1 patents #5 of 9Top 60%
📍 Pietermaritzburg, ZA: #10 of 27 inventorsTop 40%
Overall (All Time): #3,968,559 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4644085 Rooperol and its derivates Roelof W. Liebenberg 1987-02-17