Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4786017 | High temperature-resistant fibrous silicon dioxide material | Hans-Dieter Achtsnit | 1988-11-22 |
| 4471019 | Water-containing water glass fibers | Hans Zengel, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken +1 more | 1984-09-11 |
| 4332600 | Method for making silica fibers | Hans Zengel, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken +1 more | 1982-06-01 |
| 4332601 | Method for making silica fibers | Hans Zengel, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken +1 more | 1982-06-01 |