- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01C - Rotary-piston or oscillating-piston machines or engines
- F01C 9/00 - Oscillating-piston machines or engines
Patent holdings for IPC class F01C 9/00
Total number of patents in this class: 91
10-year publication summary
|
11
|
12
|
9
|
10
|
9
|
4
|
1
|
2
|
3
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FeTu Limited | 17 |
10 |
| Woodward, Inc. | 641 |
7 |
| Clearmotion, Inc. | 169 |
6 |
| LiquidPiston, Inc. | 47 |
5 |
| Fresenius Kabi Deutschland GmbH | 582 |
4 |
| Nabtesco Corporation | 886 |
4 |
| Peraves AG | 4 |
3 |
| ixetic Bad Homburg GmbH | 47 |
2 |
| Log Max AB | 32 |
2 |
| University of Sussex | 98 |
2 |
| WB Development Company, LLC | 20 |
2 |
| RapSon GmbH | 3 |
2 |
| Quest Engines, LLC | 31 |
2 |
| Hybridise Limited | 2 |
2 |
| General Electric Company | 17066 |
1 |
| The Boeing Company | 19953 |
1 |
| CapTech S.r.l. | 1 |
1 |
| Donald E. Moriarty | 5 |
1 |
| Easytork Automation Corporation | 10 |
1 |
| ElringKlinger AG | 529 |
1 |
| Other owners | 32 |