- All sections
- C - Chemistry; metallurgy
- C21D - Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making metal malleable, e.g. by decarburisation or tempering
- C21D 1/30 - Stress-relieving
Patent holdings for IPC class C21D 1/30
Total number of patents in this class: 130
10-year publication summary
16
|
17
|
14
|
14
|
7
|
10
|
5
|
9
|
11
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
11 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
6 |
Baoshan Iron & Steel Co., Ltd. | 832 |
6 |
JFE Steel Corporation | 6067 |
6 |
ArcelorMittal Wire France | 40 |
5 |
Tenaris Connections B.V. | 171 |
4 |
Ducommun Aerostructures, Inc. | 7 |
3 |
POSCO Co., Ltd. | 1059 |
3 |
Siemens AG | 24990 |
2 |
Robert Bosch GmbH | 40953 |
2 |
ArcelorMittal | 1887 |
2 |
Benteler Automobiltechnik GmbH | 258 |
2 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
2 |
POSCO | 2222 |
2 |
Sciaky, Inc. | 17 |
2 |
Nippon Steel SG Wire Co., Ltd. | 13 |
2 |
RWE Technology GmbH | 4 |
2 |
Halliburton Energy Services, Inc. | 20165 |
1 |
SNECMA S.A. | 1160 |
1 |
Toyota Motor Corporation | 28582 |
1 |
Other owners | 65 |