Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5374208 | Ship, in particular deep draft vessel having concentric, contra-rotating propellers | Gunter Pietsch | 1994-12-20 |
| 5356320 | Seal arrangement for propeller shafts of ships | Gunter Pietsch | 1994-10-18 |
| 5308269 | Seal device for rotating shafts, in particular stern tube seal for propeller shafts of a ship | Gunter Pietsch | 1994-05-03 |