- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- 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: 188
10-year publication summary
|
28
|
21
|
14
|
19
|
14
|
9
|
8
|
5
|
4
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
59 |
| Toyota Motor Corporation | 28582 |
19 |
| Nissan Motor Co., Ltd. | 12249 |
15 |
| Hedman Ericsson Patent AB | 15 |
8 |
| Ford Global Technologies, LLC | 19702 |
6 |
| Hyundai Motor Company | 19021 |
6 |
| Toyota Jidosha Kabushiki Kaisha | 983 |
5 |
| Hitachi Astemo, Ltd. | 5618 |
5 |
| Lawrence Livermore National Security, LLC | 1834 |
3 |
| Hitachi Automotive Systems, Ltd. | 3970 |
2 |
| Denso Corporation | 23338 |
2 |
| Caterpillar Inc. | 8877 |
2 |
| Kia Motors Corporation | 7946 |
2 |
| AVL List GmbH | 1232 |
2 |
| C.R.F. Societa Consortile per Azioni | 395 |
2 |
| IHI Corporation | 3268 |
2 |
| Jiangsu University | 950 |
2 |
| King Abdullah University of Science and Technology | 1703 |
2 |
| Lotus Cars Limited | 22 |
2 |
| Mce-5 Development | 36 |
2 |
| Other owners | 40 |