Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858432 | Pilot burner for an apparatus for burning off solid particles in the exhaust gas of internal combustion engines | Ulrich Projahn | 1989-08-22 |
| 4858433 | Pilot burner for an apparatus for burning off solid particles in the exhaust gas of internal combustion engines | Rolf Leonhard, Ulrich Projahn, Wolfgang Stolper | 1989-08-22 |