Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822920 | Preparation of cyclopentanone | Wolfgang Hoelderich, Matthias Schwarzmann | 1989-04-18 |
HL
Helmut Lermer
Overall (1989): #106,574 of 140,708Top 80%
1
Patents 1989