- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 9/06 - Piston-rings, seats therefor; Ring sealings of similar construction in general using separate springs expanding the rings; Springs therefor
Patent holdings for IPC class F16J 9/06
Total number of patents in this class: 209
10-year publication summary
|
13
|
19
|
23
|
18
|
20
|
20
|
14
|
12
|
15
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Riken | 265 |
33 |
| Federal-Mogul Burscheid GmbH | 284 |
32 |
| Nippon Piston Ring Co., Ltd. | 131 |
23 |
| TPR Co., Ltd. | 141 |
22 |
| MAHLE International GmbH | 2670 |
12 |
| Aquarius Engines (A.M.) Ltd. | 35 |
10 |
| Burckhardt Compression AG | 116 |
8 |
| MAHLE Metal Leve S/A | 160 |
6 |
| Mainspring Energy, Inc. | 98 |
6 |
| Tenneco Inc | 274 |
4 |
| Federal-Mogul Corporation | 362 |
3 |
| Montabert | 64 |
3 |
| Man Energy Solutions SE | 274 |
3 |
| Hitachi Metals, Ltd. | 2175 |
2 |
| Delaney Technologies Inc. | 13 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
2 |
| SCHERDEL INNOTEC Forschungs-und Entwicklungs-GmbH | 28 |
2 |
| Westport Fuel Systems Canada Inc. | 246 |
2 |
| General Electric Company | 18133 |
1 |
| Pratt & Whitney Canada Corp. | 4215 |
1 |
| Other owners | 32 |