Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741808 | Coke oven door | Helmut Lukaszewicz, Friedhelm Haaf, Mutien-Marie Renverse | 1988-05-03 |
| 4410399 | Self-sealing door assembly for a coke oven | Helmut Lukaszewicz | 1983-10-18 |
| 4394217 | Apparatus for servicing coke ovens | Helmut Lukaszewicz, Karl Gregor | 1983-07-19 |