Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4277588 | Preparation of acetylene copolymers | Herbert Naarmann, Klaus Penzien, Albrecht Eckell | 1981-07-07 |
HD
Helmut Doerfel
Overall (All Time): #4,092,820 of 4,157,543Top 100%
1
Patents All Time