Patent holdings for IPC class C21D 8/02

Total number of patents in this class: 5998

10-year publication summary

367
403
439
521
471
547
556
615
471
77
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Principal owners for this class

Owner
All patents
This class
JFE Steel Corporation
7213
1014
Nippon Steel Corporation
6616
682
POSCO Co., Ltd.
1638
626
ArcelorMittal
2479
603
POSCO
2154
510
Baoshan Iron & Steel Co., Ltd.
1053
288
ThyssenKrupp Steel Europe AG
972
147
Hyundai Steel Company
475
112
Nippon Steel & Sumitomo Metal Corporation
1985
102
NIPPON STEEL Stainless Steel Corporation
277
80
Salzgitter Flachstahl GmbH
161
70
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
2851
69
Nanjing Iron&Steel Co.,Ltd.
177
69
Tata Steel Ijmuiden B.V.
317
67
Voestalpine Stahl GmbH
376
64
ThyssenKrupp AG
3406
53
Nucor Corporation
418
38
ArcelorMittal Investigacion y Desarrollo SL
208
37
SMS Group GmbH
1151
35
Nippon Steel & Sumikin Stainless Steel Corporation
163
30
Other owners 1302