- 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: 474
10-year publication summary
|
43
|
42
|
52
|
42
|
39
|
23
|
26
|
20
|
15
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NOK Corporation | 2165 |
50 |
| NTN Corporation | 4979 |
44 |
| Eagle Industry Co., Ltd. | 1101 |
21 |
| GKN Driveline International GmbH | 166 |
20 |
| ZF Friedrichshafen AG | 7020 |
9 |
| NHK Spring Co., Ltd. | 1766 |
9 |
| Sumitomo Riko Company Limited | 1013 |
9 |
| Fukoku Co., Ltd. | 69 |
7 |
| Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | 1406 |
7 |
| Hitachi Astemo, Ltd. | 6076 |
7 |
| EagleBurgmann Japan Co., Ltd. | 53 |
6 |
| Honda Motor Co., Ltd. | 24868 |
5 |
| Caterpillar Inc. | 9158 |
5 |
| Schaeffler Technologies AG & Co. KG | 9386 |
5 |
| KYB Corporation | 1325 |
5 |
| Hitachi Automotive Systems, Ltd. | 3962 |
4 |
| Carl Freudenberg KG | 1354 |
4 |
| Hi-Lex Corporation | 344 |
4 |
| Jaguar Land Rover Limited | 4618 |
4 |
| KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH | 600 |
4 |
| Other owners | 245 |