Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6709732 | Web-type floor covering and method for its manufacture | Gerhard Graab, Klaus Heckel, Dieter Rischer | 2004-03-23 |
| 5316832 | Biodegradable sheet for culturing sewage denitrifiers | Robert Groten, Thomas Mannsbart, Volker Siekermann | 1994-05-31 |