Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5505890 | Process for manufacturing cellulose acetate membranes | Gustav Duweg, Wolfgang Ansorge | 1996-04-09 |
| 5387345 | Cellulose acetate membranes | Gustav Dunweg, Wolfgang Ansorge | 1995-02-07 |