- All sections
- C - Chemistrymetallurgy
- C21D - Modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or non-ferrous metals or alloysmaking metal malleable, e.g. by decarburisation or tempering
- C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
Patent holdings for IPC class C21D 8/06
Total number of patents in this class: 968
10-year publication summary
|
74
|
88
|
73
|
33
|
60
|
69
|
79
|
57
|
65
|
92
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6514 |
132 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
94 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
72 |
| POSCO | 2173 |
53 |
| POSCO Co., Ltd. | 1601 |
51 |
| JFE Steel Corporation | 7074 |
35 |
| Hyundai Steel Company | 452 |
23 |
| Baoshan Iron & Steel Co., Ltd. | 997 |
20 |
| NV Bekaert SA | 742 |
20 |
| NHK Spring Co., Ltd. | 1907 |
18 |
| Sumitomo Electric Industries, Ltd. | 15789 |
16 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
13 |
| ArcelorMittal | 2402 |
12 |
| Compagnie Generale des Etablissements Michelin | 4798 |
11 |
| Michelin Recherche et Technique S.A. | 2141 |
9 |
| Daido Steel Co., Ltd. | 275 |
9 |
| Nippon Steel SG Wire Co., Ltd. | 14 |
9 |
| Aperam | 129 |
8 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 63 |
8 |
| Jiangsu Shagang Group Co., Ltd. | 98 |
8 |
| Other owners | 347 |