Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9505983 | Adjustable charging hole closure for charging the coking oven chambers of a coking oven battery | Manfred Friedrichs | 2016-11-29 |
| 8529734 | Wall protector for a heating wall head between two oven chamber openings of a coke oven battery | Ulrich Kochanski, Manfred Friedrichs | 2013-09-10 |
| 5395485 | Reactor chamber door for large-scale coking reactors | Gerd Nashan, Klaus Wessiepe, Heribert Bertling, Werner Abendroth, Manfred Friedrichs +5 more | 1995-03-07 |
| 4564420 | Coke oven battery | Heinrich Spindeler, Folkard Wackerbarth, Horst Kuhlmann, Horst Althaus | 1986-01-14 |