- 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 1/42 - Induction heating
Patent holdings for IPC class C21D 1/42
Total number of patents in this class: 620
10-year publication summary
|
68
|
69
|
66
|
65
|
38
|
46
|
35
|
29
|
26
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6195 |
43 |
| NTN Corporation | 4980 |
30 |
| Neturen Co., Ltd. | 195 |
22 |
| JFE Steel Corporation | 6806 |
17 |
| Novelis Inc. | 739 |
17 |
| SMS Group GmbH | 1117 |
13 |
| Illinois Tool Works Inc. | 11437 |
12 |
| ThyssenKrupp Steel Europe AG | 952 |
12 |
| Voestalpine Stahl GmbH | 354 |
10 |
| Inductoheat, Inc. | 49 |
9 |
| Caterpillar Inc. | 9521 |
8 |
| Hyundai Motor Company | 21795 |
8 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
8 |
| Ajax Tocco Magnethermic Corporation | 99 |
7 |
| Primetals Technologies Austria GmbH | 529 |
7 |
| GM Global Technology Operations LLC | 14926 |
6 |
| Aktiebolaget SKF | 2931 |
6 |
| Magna International Inc. | 1223 |
6 |
| General Electric Company | 13838 |
5 |
| The Boeing Company | 20031 |
5 |
| Other owners | 369 |