Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12366232 | Hydraulic device | — | 2025-07-22 |
| 11802539 | Hydraulic device and a pivot joint | — | 2023-10-31 |
| 11067067 | Hydraulic device | — | 2021-07-20 |
| 10961990 | Hydraulic device | — | 2021-03-30 |
| 10961991 | Hydraulic swash block positioning system | — | 2021-03-30 |
| 10914172 | Hydraulic device | — | 2021-02-09 |
| 10830221 | Hydraulic device, a method of manufacturing a hydraulic device and a group of hydraulic devices | — | 2020-11-10 |
| 8678654 | Axial bearing for use in a hydraulic device, a hydraulic transformer and a vehicle with a hydraulic drive system | — | 2014-03-25 |
| 7967574 | Variable pump or hydraulic motor | — | 2011-06-28 |
| 7731485 | Reciprocating cylinder swash plate pump | — | 2010-06-08 |
| 7328647 | Hydraulic device | — | 2008-02-12 |
| 7311034 | Hydraulic device | — | 2007-12-25 |
| 7090472 | Pump or motor with interconnected chambers in the rotor | — | 2006-08-15 |
| 6893231 | Hydraulic device | — | 2005-05-17 |
| 6823671 | Free-piston unit for generating hydraulic energy | — | 2004-11-30 |
| 6575076 | Hydraulic installations | — | 2003-06-10 |
| 6279517 | Free piston engine provided with a purging air dosing system | — | 2001-08-28 |
| 6223529 | Hydraulic system with a hydromotor fed by a hydraulic transformer | — | 2001-05-01 |
| 5983638 | Hydraulic switching valve, and a free piston engine provided therewith | Theodorus Gerhardus Potma, Maria Pauline Engel | 1999-11-16 |
| 5829393 | Free-piston engine | Theodorus Gerhardus Potma | 1998-11-03 |
| 5556262 | Free-piston engine having a fluid energy unit | Theodorus Gerhardus Potma | 1996-09-17 |
| 5540193 | Method for the cold start of a free-piston engine; and free-piston engine adapted for use of this method | Theodorus Gerhardus Potma | 1996-07-30 |
| 5482445 | Free-piston engine having a slidable ring for moving the piston | Theodorus Gerhardus Potma | 1996-01-09 |
| 5473893 | Free-piston engine having a fluid pressure unit | Theodorus Gerhardus Potma | 1995-12-12 |