Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4289500 | Method of producing hot briquettes | Heinrich Weber, Horst Dungs, Karl-Heinz Wollenhaupt, Henri Birscheidt, Franz Beckmann | 1981-09-15 |
| 4248603 | Method and tank for producing hot briquettes | Heinrich Weber, Horst Dungs, Fritz Ferdinand, Henri Birscheidt | 1981-02-03 |