- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 3/04 - Bellows
Patent holdings for IPC class F16J 3/04
Total number of patents in this class: 480
10-year publication summary
|
41
|
41
|
50
|
41
|
39
|
23
|
26
|
21
|
16
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NOK Corporation | 2222 |
50 |
| NTN Corporation | 4973 |
43 |
| Eagle Industry Co., Ltd. | 1129 |
21 |
| GKN Driveline International GmbH | 156 |
19 |
| NHK Spring Co., Ltd. | 1870 |
10 |
| ZF Friedrichshafen AG | 7156 |
9 |
| Sumitomo Riko Company Limited | 1060 |
9 |
| Hitachi Astemo, Ltd. | 6385 |
8 |
| Fukoku Co., Ltd. | 69 |
7 |
| Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | 1401 |
7 |
| EagleBurgmann Japan Co., Ltd. | 53 |
6 |
| Honda Motor Co., Ltd. | 25327 |
5 |
| Caterpillar Inc. | 9579 |
5 |
| Schaeffler Technologies AG & Co. KG | 9908 |
5 |
| Hi-Lex Corporation | 355 |
5 |
| KYB Corporation | 1360 |
5 |
| Hitachi Automotive Systems, Ltd. | 3957 |
4 |
| Carl Freudenberg KG | 1367 |
4 |
| Jaguar Land Rover Limited | 4762 |
4 |
| KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH | 622 |
4 |
| Other owners | 250 |