- 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 1/63 - Quenching devices for bath quenching
Patent holdings for IPC class C21D 1/63
Total number of patents in this class: 133
10-year publication summary
|
10
|
7
|
7
|
15
|
11
|
14
|
5
|
15
|
5
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6935 |
22 |
| Danieli & C. Officine Meccaniche S.p.A. | 716 |
9 |
| NTN Corporation | 4973 |
6 |
| NSK Ltd. | 2793 |
6 |
| Temper Corporation | 34 |
5 |
| NV Bekaert SA | 744 |
4 |
| Voestalpine Schienen GmbH | 14 |
4 |
| Rolls-Royce Corporation | 1760 |
3 |
| Temper Axle Products Corporation | 79 |
3 |
| ZF Friedrichshafen AG | 7180 |
2 |
| Ajax Tocco Magnethermic Corporation | 98 |
2 |
| ArcelorMittal | 2324 |
2 |
| Chugai Ro Co., Ltd. | 130 |
2 |
| Fives Stein | 105 |
2 |
| Houghton Technical Corp. | 109 |
2 |
| Neturen Co., Ltd. | 198 |
2 |
| Neturen Takuto Co., Ltd. | 5 |
2 |
| POSCO | 2181 |
2 |
| POSCO Co., Ltd. | 1572 |
2 |
| Safran Landing Systems Canada Inc. / Safran Systemes D'atterrissage Canada Inc. | 103 |
2 |
| Other owners | 49 |