- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F02F - Cylinders, pistons, or casings for combustion engines; arrangements of sealings in combustion engines
- F02F 3/12 - Pistons having surface coverings on piston heads
Patent holdings for IPC class F02F 3/12
Total number of patents in this class: 111
10-year publication summary
|
16
|
20
|
17
|
11
|
9
|
5
|
7
|
4
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tenneco Inc | 283 |
12 |
| Mazda Motor Corporation | 3069 |
7 |
| Toyota Motor Corporation | 30345 |
6 |
| Hitachi Automotive Systems, Ltd. | 3962 |
6 |
| MAHLE International GmbH | 2690 |
5 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13109 |
5 |
| Isuzu Motors Limited | 2238 |
4 |
| Weichai Power Co., Ltd. | 285 |
4 |
| Daimler AG | 3418 |
3 |
| Akros Co., Ltd. | 16 |
3 |
| Federal-Mogul Nurnberg GmbH | 137 |
3 |
| Federal-Mogul LLC | 122 |
3 |
| Hyundai Motor Company | 20403 |
2 |
| Aisin Seiki Kabushiki Kaisha | 2286 |
2 |
| Kia Motors Corporation | 7779 |
2 |
| Cummins Inc. | 2467 |
2 |
| KS Kolbenschmidt GmbH | 160 |
2 |
| University of Connecticut | 814 |
2 |
| Volvo Truck Corporation | 3094 |
2 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 323 |
2 |
| Other owners | 34 |