Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5336119 | Drive unit for relatively small watercraft | Gerd Krautkrämer, Stefan Huth, Stephan Schneider | 1994-08-09 |
| 5209682 | Speed and direction indicator for ships | Ulrich Duning, Reinhold Knecht | 1993-05-11 |
| 5146865 | Water-jet propulsion system for ships which are intended to be used in shallow waters | Gerd Krautkrämer | 1992-09-15 |
| 4519335 | Device for controlling the direction of movement and thrust force of a watercraft | Franz Krautkremer, Reinhold Knecht, Detlev Stache | 1985-05-28 |
| 4419082 | Water-jet drive mechanism for driving and controlling of particularly shallow-draught watercrafts | Franz Krautkremer | 1983-12-06 |
| 4411630 | Water-jet drive mechanism for the driving of watercraft | Franz Krautkremer | 1983-10-25 |
| 4334489 | Reversing mechanism for steerable propellers, jet rudders or other drive mechanisms of ships | Kurt Seitzinger | 1982-06-15 |