- All sections
- B - Performing operationstransporting
- B21B - Rolling of metal
- B21B 19/04 - Rolling basic material of solid, i.e. non-hollow, structurePiercing
Patent holdings for IPC class B21B 19/04
Total number of patents in this class: 154
10-year publication summary
|
10
|
11
|
6
|
11
|
6
|
6
|
6
|
8
|
3
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6255 |
60 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
23 |
| Sumitomo Metal Industries, Ltd. | 378 |
16 |
| JFE Steel Corporation | 6852 |
12 |
| Baoshan Iron & Steel Co., Ltd. | 963 |
6 |
| Danieli & C. Officine Meccaniche S.p.A. | 716 |
4 |
| SMS INNSE S.p.A. | 22 |
4 |
| SMS Group GmbH | 1127 |
3 |
| SMS Meer GmbH | 65 |
3 |
| DALMINE S.p.A. | 22 |
2 |
| Saudi Arabian Oil Company | 13185 |
2 |
| V & M Deutschland GmbH | 36 |
2 |
| Vallourec Deutschland GmbH | 40 |
2 |
| Suzhou Golden-way Steel Tube Co., Ltd | 2 |
2 |
| Alcoa Inc. | 290 |
1 |
| Coating Management Switzerland GmbH | 3 |
1 |
| GFM - GmbH | 32 |
1 |
| Mitsubishi Aircraft Corporation | 136 |
1 |
| NHK Spring Co., Ltd. | 1862 |
1 |
| Northwestern Polytechnical University | 137 |
1 |
| Other owners | 7 |