- All sections
- B - Performing operations; transporting
- B21B - Rolling of metal
- B21B 3/02 - Rolling special iron alloys
Patent holdings for IPC class B21B 3/02
Total number of patents in this class: 243
10-year publication summary
|
15
|
16
|
15
|
33
|
17
|
22
|
18
|
11
|
16
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
67 |
| Nippon Steel Corporation | 5649 |
26 |
| POSCO | 2222 |
16 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
15 |
| ArcelorMittal | 1887 |
12 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
11 |
| POSCO Co., Ltd. | 1059 |
11 |
| Hitachi Metals, Ltd. | 2175 |
9 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
6 |
| Dai Nippon Printing Co., Ltd. | 3891 |
4 |
| Outokumpu Oyj | 250 |
4 |
| Hyundai Steel Company | 310 |
3 |
| Komatsu Seiki Kosakusho Co., Ltd. | 12 |
3 |
| Nisshin Steel Co., Ltd. | 401 |
3 |
| SMS Group GmbH | 1029 |
3 |
| Aperam | 104 |
2 |
| ATI Properties LLC | 202 |
2 |
| Berndorf Band GmbH | 111 |
2 |
| Big River Steel LLC | 25 |
2 |
| Nippon Yakin Kogyo Co., Ltd. | 51 |
2 |
| Other owners | 40 |