Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863485 | Fuel briquettes | Hans G. Scafer, Wolfgang Cieslik, Heinz Opdenwinkel, Gunter Poppel, Horst Schurmann | 1989-09-05 |
| 4586936 | Fuel briquets | Hans-Georg Schaffer, Gunter Poppel, Horst Schurmann | 1986-05-06 |
| 4369042 | Fuel briquets | Hans G. Schafer, Gunter Poppel, Horst Schurmann | 1983-01-18 |