- All sections
- B - Performing operationstransporting
- B21J - Forginghammeringpressing metalrivetingforge furnaces
- B21J 5/08 - Upsetting
Patent holdings for IPC class B21J 5/08
Total number of patents in this class: 240
10-year publication summary
|
29
|
25
|
20
|
13
|
12
|
14
|
7
|
5
|
8
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
14 |
| Neturen Co., Ltd. | 198 |
11 |
| NTN Corporation | 4925 |
9 |
| Nippon Steel Corporation | 6982 |
8 |
| NSK Ltd. | 2845 |
6 |
| Tata Steel Limited | 165 |
6 |
| ILJIN Steel Corporation | 7 |
4 |
| ZF Friedrichshafen AG | 7276 |
3 |
| ATI Properties LLC | 201 |
3 |
| Bharat Forge Ltd. | 50 |
3 |
| Dayton Progress Corporation | 35 |
3 |
| IHI Corporation | 3543 |
3 |
| KS Kolbenschmidt US, Inc. | 5 |
3 |
| Magna International Inc. | 1177 |
3 |
| Nidec Corporation | 2818 |
3 |
| Schuler Cartec GmbH & Co. KG | 4 |
3 |
| Sungjin Fo-ma Inc. | 9 |
3 |
| Zenkung Heavy Industry (Jiangsu) Co., Ltd. | 8 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 9204 |
2 |
| Hitachi Metals, Ltd. | 1822 |
2 |
| Other owners | 145 |