Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D868856 | Spot welding gun | — | 2019-12-03 |
| 5908872 | Production of expandable styrene polymers | Guiscard Glück, Klaus Hahn, Achim Löffler | 1999-06-01 |
| 5698603 | Expandable styrene polymers containing recycled material | Dietrich Scherzer, Klaus Hahn, Michael Witt | 1997-12-16 |
| 5561170 | Preparation of expandable thermoplastic polymers by post-impregnation | Michael Witt, Klaus Hahn | 1996-10-01 |
| 5110835 | Antistatic expandable styrene polymers in bead form | Manfred Walter, Karl-Heinz Wassmer | 1992-05-05 |