Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4574541 | Foundation-drainage panel | Heinz Peter Raidt, Klaus Urban | 1986-03-11 |
| 4555433 | Sound-absorbing element | Klaus Urban, Heinz Peter Raidt, Eberhard Schepers | 1985-11-26 |