Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814505 | Purification of n-vinylformamide | Michael Kroener, Willi Schmidt, Alfred Oftring, Heinrich Hartmann | 1989-03-21 |
TP
Theo Proll
Overall (1989): #50,132 of 140,708Top 40%
1
Patents 1989