Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838917 | Process and apparatus for the production of very fine mineral fibers, in particular glass fibers | Wolfram Wagner, Roger Nyssen, Hans-Theo van Pey | 1989-06-13 |
| 4794751 | Sealing of apparatus with continuous product transport | Wolfram Wagner, Peter-Roger Nyssen, Dieter Paulini, Siegfried Kulisch | 1989-01-03 |