- 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 1/30 - Stress-relieving
Patent holdings for IPC class C21D 1/30
Total number of patents in this class: 155
10-year publication summary
|
17
|
14
|
14
|
8
|
10
|
5
|
10
|
11
|
13
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6231 |
13 |
| JFE Steel Corporation | 6833 |
10 |
| Baoshan Iron & Steel Co., Ltd. | 962 |
7 |
| Mitsubishi Heavy Industries, Ltd. | 8712 |
6 |
| ArcelorMittal Wire France | 42 |
5 |
| POSCO Co., Ltd. | 1564 |
5 |
| Ducommun Aerostructures, Inc. | 7 |
3 |
| Sciaky, Inc. | 18 |
3 |
| Tenaris Connections B.V. | 167 |
3 |
| Nippon Steel SG Wire Co., Ltd. | 14 |
3 |
| Siemens AG | 24505 |
2 |
| Robert Bosch GmbH | 42674 |
2 |
| Hyundai Motor Company | 21960 |
2 |
| ArcelorMittal | 2280 |
2 |
| Benteler Automobiltechnik GmbH | 290 |
2 |
| NHK Spring Co., Ltd. | 1858 |
2 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
2 |
| POSCO | 2187 |
2 |
| Relativity Space, Inc. | 79 |
2 |
| Valls Besitz GmbH | 10 |
2 |
| Other owners | 77 |