- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 9/26 - Piston-rings, seats therefor; Ring sealings of similar construction in general characterised by the use of particular materials
Patent holdings for IPC class F16J 9/26
Total number of patents in this class: 573
10-year publication summary
|
64
|
46
|
51
|
48
|
41
|
37
|
20
|
23
|
24
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Federal-Mogul Burscheid GmbH | 284 |
112 |
| Kabushiki Kaisha Riken | 265 |
89 |
| MAHLE International GmbH | 2670 |
75 |
| MAHLE Metal Leve S/A | 160 |
49 |
| Nippon Piston Ring Co., Ltd. | 131 |
43 |
| TPR Co., Ltd. | 141 |
26 |
| Tenneco Inc | 274 |
13 |
| Nippon Itf, Inc. | 42 |
8 |
| Honda Motor Co., Ltd. | 24537 |
7 |
| Mainspring Energy, Inc. | 98 |
7 |
| Nissan Motor Co., Ltd. | 12249 |
6 |
| Federal-Mogul Corporation | 362 |
6 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 345 |
6 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1334 |
4 |
| Tokusen Kogyo Co., Ltd. | 75 |
4 |
| Rtx Corporation | 8674 |
4 |
| Hitachi Metals, Ltd. | 2175 |
3 |
| Federal-Mogul Friedberg GmbH | 10 |
3 |
| MAHLE GmbH | 31 |
3 |
| Nanofilm Vacuum Coating (Shanghai) Co., Ltd. | 13 |
3 |
| Other owners | 102 |