- All sections
- B - Performing operationstransporting
- B21J - Forginghammeringpressing metalrivetingforge furnaces
- B21J 5/02 - Die forgingTrimming by making use of special dies
Patent holdings for IPC class B21J 5/02
Total number of patents in this class: 400
10-year publication summary
|
53
|
48
|
43
|
32
|
22
|
23
|
22
|
13
|
17
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6839 |
29 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
22 |
| NSK Ltd. | 2829 |
16 |
| Hitachi Metals, Ltd. | 1901 |
14 |
| NTN Corporation | 4914 |
13 |
| Bharat Forge Ltd. | 49 |
6 |
| Rolls-Royce PLC | 3222 |
5 |
| Sungjin Fo-ma Inc. | 9 |
5 |
| Aubert & Duval | 114 |
4 |
| ThyssenKrupp Presta AG | 1107 |
4 |
| Howmet Aerospace Inc. | 406 |
4 |
| Rtx Corporation | 10055 |
4 |
| Honda Motor Co., Ltd. | 26006 |
3 |
| Toyota Motor Corporation | 35578 |
3 |
| Denso Corporation | 25495 |
3 |
| Showa Denko K.K. | 2075 |
3 |
| CITIC Dicastal CO., LTD | 568 |
3 |
| Eaton Capital | 9 |
3 |
| JFE Steel Corporation | 7483 |
3 |
| Kobe Steel, Ltd. | 899 |
3 |
| Other owners | 250 |