- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F02F - Cylinders, pistons, or casings for combustion engines; arrangements of sealings in combustion engines
- F02F 3/28 - Other pistons with specially-shaped head
Patent holdings for IPC class F02F 3/28
Total number of patents in this class: 222
10-year publication summary
|
38
|
36
|
47
|
19
|
24
|
21
|
16
|
13
|
7
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Caterpillar Inc. | 9149 |
28 |
| Mazda Motor Corporation | 3069 |
13 |
| MAHLE International GmbH | 2690 |
12 |
| Aquarius Engines (A.M.) Ltd. | 37 |
11 |
| Quest Engines, LLC | 31 |
11 |
| Tenneco Inc | 283 |
9 |
| Cummins Inc. | 2467 |
7 |
| Scania CV AB | 2377 |
7 |
| Achates Power, Inc. | 208 |
6 |
| Mainspring Energy, Inc. | 105 |
6 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 323 |
4 |
| Transportation IP Holdings, LLC | 904 |
4 |
| Ford Global Technologies, LLC | 20057 |
3 |
| Nissan Motor Co., Ltd. | 12332 |
3 |
| Perkins Engines Company Limited | 283 |
3 |
| Daimler AG | 3418 |
3 |
| z Mechanism Technology Institute Co., Ltd. | 8 |
3 |
| Subaru Corporation | 3303 |
3 |
| Transcend Energy Group, LLC | 6 |
3 |
| AI Alpine US Bidco Inc. | 105 |
3 |
| Other owners | 80 |