Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4664140 | Reversing valve | — | 1987-05-12 |
| 4564419 | Nozzle plate construction for underjet coke ovens | Heinz Spindeler, Folkard Wackerbarth | 1986-01-14 |
| 4357211 | Air control arrangement for regeneratively-heated coke ovens | Folkard Wackerbarth, Horst Kuhlmann | 1982-11-02 |