- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 3/04 - Bellows
Patent holdings for IPC class F16J 3/04
Total number of patents in this class: 477
10-year publication summary
|
32
|
43
|
42
|
52
|
42
|
39
|
23
|
24
|
20
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NOK Corporation | 2108 |
50 |
| NTN Corporation | 5008 |
46 |
| Eagle Industry Co., Ltd. | 1062 |
21 |
| GKN Driveline International GmbH | 189 |
21 |
| ZF Friedrichshafen AG | 6820 |
9 |
| NHK Spring Co., Ltd. | 1657 |
9 |
| Sumitomo Riko Company Limited | 962 |
9 |
| Fukoku Co., Ltd. | 69 |
7 |
| Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | 1407 |
7 |
| EagleBurgmann Japan Co., Ltd. | 52 |
6 |
| Hitachi Astemo, Ltd. | 5618 |
6 |
| Honda Motor Co., Ltd. | 24537 |
5 |
| Caterpillar Inc. | 8877 |
5 |
| Schaeffler Technologies AG & Co. KG | 8880 |
5 |
| KYB Corporation | 1278 |
5 |
| Toyo Tire & Rubber Co., Ltd. | 631 |
5 |
| Hitachi Automotive Systems, Ltd. | 3970 |
4 |
| Continental Teves AG & Co. oHG | 2354 |
4 |
| Carl Freudenberg KG | 1346 |
4 |
| GKN Driveline North America, Inc. | 134 |
4 |
| Other owners | 245 |