- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
Patent holdings for IPC class F16J 9/28
Total number of patents in this class: 80
10-year publication summary
|
15
|
7
|
6
|
7
|
7
|
6
|
3
|
9
|
6
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mainspring Energy, Inc. | 113 |
7 |
| Kabushiki Kaisha Riken | 288 |
6 |
| NTN Corporation | 4975 |
5 |
| Burckhardt Compression AG | 121 |
5 |
| Federal-Mogul Burscheid GmbH | 283 |
4 |
| Nissan Motor Co., Ltd. | 12511 |
3 |
| Southwest Research Institute | 751 |
3 |
| Daikin Industries, Ltd. | 10016 |
2 |
| Sumitomo Rubber Industries, Ltd. | 4651 |
2 |
| Biosense Webster (Israel) Ltd. | 2152 |
2 |
| Nippon Piston Ring Co., Ltd. | 135 |
2 |
| Tenneco Inc | 280 |
2 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 256 |
2 |
| Briggs & Stratton, LLC | 672 |
2 |
| Coutts Industries Inc. | 4 |
2 |
| E. I. du Pont de Nemours and Company | 4058 |
1 |
| Dow Global Technologies LLC | 10349 |
1 |
| Hamilton Sundstrand Corporation | 4888 |
1 |
| Sabic Innovative Plastics IP B.V. | 681 |
1 |
| ASIMCO Shuanghuan Piston Ring (Yizheng) Co., Ltd. | 7 |
1 |
| Other owners | 26 |