- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F02F - Cylinders, pistons, or casings for combustion enginesarrangements of sealings in combustion engines
- F02F 5/00 - Piston rings, e.g. associated with piston crown
Patent holdings for IPC class F02F 5/00
Total number of patents in this class: 285
10-year publication summary
|
17
|
25
|
25
|
23
|
15
|
16
|
12
|
10
|
11
|
10
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Riken | 297 |
104 |
| Nippon Piston Ring Co., Ltd. | 138 |
35 |
| TPR Co., Ltd. | 174 |
29 |
| MAHLE International GmbH | 2924 |
9 |
| Federal-Mogul Burscheid GmbH | 277 |
7 |
| MAHLE Metal Leve S/A | 156 |
6 |
| Hitachi Metals, Ltd. | 1813 |
5 |
| Tokusen Kogyo Co., Ltd. | 77 |
5 |
| Nissan Motor Co., Ltd. | 13071 |
4 |
| Mainspring Energy, Inc. | 125 |
4 |
| Pratt & Whitney Canada Corp. | 5584 |
3 |
| Isuzu Motors Limited | 2339 |
3 |
| WB Development Company, LLC | 19 |
3 |
| ASIMCO Shuanghuan Piston Ring (Yizheng) Co., Ltd. | 7 |
2 |
| Bando Kiko Co., Ltd. | 77 |
2 |
| Burckhardt Compression AG | 126 |
2 |
| Concordia University | 107 |
2 |
| Cummins Inc. | 2659 |
2 |
| DeltaHawk Engines, Inc. | 27 |
2 |
| Honda Foundry Co., Ltd. | 26 |
2 |
| Other owners | 54 |