RS

Rolf Sommerfeld

BG Bergwerksverband Gmbh: 1 patents #90 of 243Top 40%
RA Ruhrkohle Ag: 1 patents #23 of 88Top 30%
Overall (All Time): #4,112,662 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4204986 Sealing, caulking and protective shielding composition of thermoplastic synthetic materials and carbonaceous materials Ingo Romey, Aloys Schlutter 1980-05-27