- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F02F - Cylinders, pistons, or casings for combustion enginesarrangements 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: 236
10-year publication summary
|
35
|
46
|
19
|
24
|
21
|
16
|
13
|
8
|
12
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Caterpillar Inc. | 10132 |
30 |
| Mazda Motor Corporation | 3271 |
13 |
| MAHLE International GmbH | 2883 |
12 |
| Aquarius Engines (A.M.) Ltd. | 35 |
11 |
| Quest Engines, LLC | 31 |
11 |
| Cummins Inc. | 2594 |
8 |
| Federal-Mogul Powertrain LLC | 274 |
8 |
| Scania CV AB | 2402 |
7 |
| Mainspring Energy, Inc. | 118 |
7 |
| General Atomics Aeronautical Systems, Inc. | 210 |
6 |
| Isuzu Motors Limited | 2304 |
4 |
| Transportation IP Holdings, LLC | 974 |
4 |
| Ford Global Technologies, LLC | 21274 |
3 |
| Nissan Motor Co., Ltd. | 12763 |
3 |
| Perkins Engines Company Limited | 297 |
3 |
| z Mechanism Technology Institute Co., Ltd. | 8 |
3 |
| Subaru Corporation | 3871 |
3 |
| Transcend Energy Group, LLC | 6 |
3 |
| AI Alpine US Bidco Inc. | 103 |
3 |
| MAN Truck & Bus SE | 491 |
3 |
| Other owners | 91 |