- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 15/3256 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
Patent holdings for IPC class F16J 15/3256
Total number of patents in this class: 92
10-year publication summary
|
4
|
12
|
7
|
13
|
9
|
12
|
13
|
16
|
11
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NOK Corporation | 2108 |
16 |
| Aktiebolaget SKF | 2700 |
12 |
| NTN Corporation | 5008 |
7 |
| Schaeffler Technologies AG & Co. KG | 8880 |
5 |
| Freudenberg Sealing Technologies S.A.S. di Externa Italia S.r.l.u | 19 |
4 |
| Aktiebolaget SKF | 98 |
4 |
| Caterpillar Inc. | 8877 |
3 |
| NSK Ltd. | 2719 |
3 |
| Stryker Corporation | 3864 |
3 |
| Freudenberg-NOK General Partnership | 178 |
3 |
| Amsted Rail Company, Inc. | 432 |
2 |
| Eagle Industry Co., Ltd. | 1062 |
2 |
| Trelleborg Sealing Solutions Germany GmbH | 183 |
2 |
| Trelleborg Sealing Solutions US, Inc. | 30 |
2 |
| Kinetic Pressure Control Limited | 66 |
2 |
| Bridgestone Corporation | 7067 |
1 |
| ZF Friedrichshafen AG | 6820 |
1 |
| AES Engineering Ltd. | 95 |
1 |
| ArvinMeritor Technology, LLC | 404 |
1 |
| Bell Helicopter Textron Inc. | 1122 |
1 |
| Other owners | 17 |