Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6676403 | Self extinguishing and self cleaning candle holder | — | 2004-01-13 |
| 6443419 | Fast working hydraulic valve | — | 2002-09-03 |
| 5983638 | Hydraulic switching valve, and a free piston engine provided therewith | Peter Augustinus Johannes Achten, Maria Pauline Engel | 1999-11-16 |
| 5829393 | Free-piston engine | Peter Augustinus Johannes Achten | 1998-11-03 |
| 5608581 | Rear view apparatus | — | 1997-03-04 |
| 5556262 | Free-piston engine having a fluid energy unit | Peter Augustinus Johannes Achten | 1996-09-17 |
| 5540193 | Method for the cold start of a free-piston engine; and free-piston engine adapted for use of this method | Peter Augustinus Johannes Achten | 1996-07-30 |
| 5482445 | Free-piston engine having a slidable ring for moving the piston | Peter Augustinus Johannes Achten | 1996-01-09 |
| 5473893 | Free-piston engine having a fluid pressure unit | Peter Augustinus Johannes Achten | 1995-12-12 |