- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 9/28 - Piston-rings, seats therefor; Ring 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: 74
10-year publication summary
|
9
|
16
|
7
|
6
|
7
|
9
|
6
|
2
|
9
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Riken | 265 |
6 |
| Mainspring Energy, Inc. | 98 |
6 |
| Burckhardt Compression AG | 116 |
5 |
| Federal-Mogul Burscheid GmbH | 284 |
4 |
| Nissan Motor Co., Ltd. | 12249 |
3 |
| NTN Corporation | 5008 |
3 |
| Bendix Commercial Vehicle Systems LLC | 898 |
3 |
| Sumitomo Rubber Industries, Ltd. | 4421 |
2 |
| Biosense Webster (Israel) Ltd. | 1925 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
2 |
| Nippon Piston Ring Co., Ltd. | 131 |
2 |
| Southwest Research Institute | 791 |
2 |
| Tenneco Inc | 274 |
2 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 345 |
2 |
| Briggs & Stratton, LLC | 673 |
2 |
| Coutts Industries Inc. | 4 |
2 |
| E. I. du Pont de Nemours and Company | 4345 |
1 |
| Daikin Industries, Ltd. | 9495 |
1 |
| Dow Global Technologies LLC | 10147 |
1 |
| Sabic Innovative Plastics IP B.V. | 683 |
1 |
| Other owners | 22 |