- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 9/06 - Piston-rings, seats thereforRing sealings of similar construction in general using separate springs expanding the ringsSprings therefor
Patent holdings for IPC class F16J 9/06
Total number of patents in this class: 211
10-year publication summary
|
19
|
23
|
18
|
20
|
20
|
14
|
13
|
16
|
6
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Riken | 285 |
33 |
| Federal-Mogul Burscheid GmbH | 283 |
32 |
| TPR Co., Ltd. | 160 |
24 |
| Nippon Piston Ring Co., Ltd. | 135 |
22 |
| MAHLE International GmbH | 2765 |
11 |
| Aquarius Engines (A.M.) Ltd. | 37 |
10 |
| Burckhardt Compression AG | 121 |
8 |
| Mainspring Energy, Inc. | 111 |
7 |
| MAHLE Metal Leve S/A | 157 |
5 |
| Tenneco Inc | 280 |
4 |
| Federal-Mogul Corporation | 313 |
3 |
| Man Energy Solutions SE | 261 |
3 |
| Hitachi Metals, Ltd. | 1982 |
2 |
| BAE Systems Bofors AB | 205 |
2 |
| Cummins Inc. | 2576 |
2 |
| Delaney Technologies Inc. | 13 |
2 |
| Montabert | 59 |
2 |
| SCHERDEL INNOTEC Forschungs-und Entwicklungs-GmbH | 34 |
2 |
| HPDI Technology Limited Partnership | 178 |
2 |
| General Electric Company | 13767 |
1 |
| Other owners | 34 |