Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4564421 | Ascension pipe for coke ovens | Franz Hegemann | 1986-01-14 |
| 4382841 | Apparatus for operating offtake and main valves | Dieter Janssen | 1983-05-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4564421 | Ascension pipe for coke ovens | Franz Hegemann | 1986-01-14 |
| 4382841 | Apparatus for operating offtake and main valves | Dieter Janssen | 1983-05-10 |