Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621028 | Light-scattering translucent polymethacrylate molded articles with good resistance to elevated temperature and weathering | Hans Lichtenstein | 1997-04-15 |
| 5387634 | Tinted plexiglass with organic pigments | Hans Lichtenstein, Manfred Krieg | 1995-02-07 |