Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795802 | Removal of vinylpyrrolidone from vinylpyrrolidone polymers | Adolf Nuber, Axel Sanner | 1989-01-03 |
DU
Dieter Urban
Overall (1989): #120,122 of 140,708Top 90%
1
Patents 1989