- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 9/12 - Piston-rings, seats therefor; Ring sealings of similar construction in general - Details
Patent holdings for IPC class F16J 9/12
Total number of patents in this class: 143
10-year publication summary
|
21
|
21
|
27
|
15
|
14
|
10
|
11
|
9
|
8
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Aquarius Engines (A.M.) Ltd. | 35 |
11 |
| Kabushiki Kaisha Riken | 265 |
10 |
| Federal-Mogul Burscheid GmbH | 284 |
7 |
| MAHLE International GmbH | 2670 |
7 |
| Nippon Piston Ring Co., Ltd. | 131 |
7 |
| TPR Co., Ltd. | 141 |
5 |
| Mainspring Energy, Inc. | 98 |
5 |
| Robert Bosch GmbH | 40953 |
3 |
| Aktiebolaget SKF | 2700 |
3 |
| Burckhardt Compression AG | 116 |
3 |
| MAHLE Metal Leve S/A | 160 |
3 |
| Marathon Valve LLC | 3 |
3 |
| Tenneco Inc | 274 |
3 |
| Westport Fuel Systems Canada Inc. | 246 |
3 |
| Illinois Tool Works Inc. | 11152 |
2 |
| Pratt & Whitney Canada Corp. | 4215 |
2 |
| Ford Global Technologies, LLC | 19702 |
2 |
| Hamilton Sundstrand Corporation | 4525 |
2 |
| JPMorgan Chase Bank, National Association | 10964 |
2 |
| Isuzu Motors Limited | 2158 |
2 |
| Other owners | 58 |