Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6528549 | Rigid polyurethane foams | Thomas Heinrich Sieker, Saskia Rachel Walraedt | 2003-03-04 |
| 6403665 | Rigid polyurethane foams | Thomas Heinrich Sieker, Saskia Rachel Walraedt | 2002-06-11 |
| 6346205 | Rigid polyurethane foams | Thomas Heinrich Sieker | 2002-02-12 |
| 6207725 | Rigid polyurethane foams | Thomas Heinrich Sieker | 2001-03-27 |