Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4259064 | Ceramic burner | Rudolf Hebel, Peter Artelt, Gerhard Esfeld, Arnold Jacob | 1981-03-31 |
| 4253410 | Relief brickwork over opening in refractory brick wall | Martin Zettel, Erich Ambrosius | 1981-03-03 |