- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F02D - Controlling combustion engines
- F02D 15/04 - Varying compression ratio by alteration of volume of compression space without changing piston stroke
Patent holdings for IPC class F02D 15/04
Total number of patents in this class: 171
10-year publication summary
|
14
|
19
|
14
|
9
|
8
|
5
|
4
|
2
|
3
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12378 |
53 |
| Toyota Motor Corporation | 35813 |
16 |
| Nissan Motor Co., Ltd. | 12966 |
13 |
| Hedman Ericsson Patent AB | 15 |
8 |
| Ford Global Technologies, LLC | 21524 |
6 |
| Hitachi Astemo, Ltd. | 6407 |
5 |
| Hyundai Motor Company | 24703 |
4 |
| Toyota Jidosha Kabushiki Kaisha | 550 |
4 |
| Lawrence Livermore National Security, LLC | 1976 |
3 |
| Hitachi Automotive Systems, Ltd. | 3954 |
2 |
| Denso Corporation | 25579 |
2 |
| AVL List GmbH | 1324 |
2 |
| C.R.F. Societa Consortile per Azioni | 384 |
2 |
| IHI Corporation | 3535 |
2 |
| Jiangsu University | 1167 |
2 |
| King Abdullah University of Science and Technology | 1855 |
2 |
| Mce-5 Development | 36 |
2 |
| Peugeot Citroen Automobiles SA | 1659 |
2 |
| Pinnacle Engines, Inc. | 35 |
2 |
| Kenneth W. Cowans and Joann M. Cowans Trust | 2 |
2 |
| Other owners | 37 |