Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859286 | Isolation of 1,3-butadiene | Gerd Kaibel, Werner Hefner, Peter Keller | 1989-08-22 |
WD
Werner Drewitz
Overall (All Time): #3,935,843 of 4,157,543Top 95%
1
Patents All Time