- All sections
- B - Performing operations; transporting
- B21B - Rolling of metal
- B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
Patent holdings for IPC class B21B 3/00
Total number of patents in this class: 888
10-year publication summary
|
65
|
58
|
89
|
45
|
61
|
50
|
69
|
29
|
20
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
122 |
| Nippon Steel Corporation | 5649 |
93 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
86 |
| POSCO | 2222 |
72 |
| JX Nippon Mining & Metals Corporation | 1576 |
30 |
| UACJ Corporation | 631 |
28 |
| Sumitomo Electric Industries, Ltd. | 14131 |
26 |
| Novelis Inc. | 656 |
24 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
23 |
| Mitsubishi Materials Corporation | 2378 |
18 |
| The Furukawa Electric Co., Ltd. | 3486 |
14 |
| Mitsubishi Shindoh Co., Ltd. | 135 |
11 |
| Nippon Light Metal Company, Ltd. | 645 |
10 |
| POSCO Co., Ltd. | 1059 |
9 |
| Constellium Issoire | 208 |
8 |
| Hyundai Steel Company | 310 |
8 |
| Sumitomo Metal Industries, Ltd. | 453 |
8 |
| Toyo Aluminium Kabushiki Kaisha | 357 |
8 |
| Poongsan Corporation | 54 |
7 |
| Toho Titanium Co., Ltd. | 249 |
7 |
| Other owners | 276 |