- 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 1/42 - Induction heating
Patent holdings for IPC class C21D 1/42
Total number of patents in this class: 585
10-year publication summary
67
|
68
|
69
|
64
|
64
|
38
|
46
|
34
|
28
|
7
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
44 |
NTN Corporation | 5008 |
31 |
Neturen Co., Ltd. | 193 |
21 |
JFE Steel Corporation | 6067 |
15 |
Novelis Inc. | 656 |
15 |
Illinois Tool Works Inc. | 11152 |
11 |
ThyssenKrupp Steel Europe AG | 924 |
11 |
SMS Group GmbH | 1029 |
10 |
Voestalpine Stahl GmbH | 311 |
10 |
Inductoheat, Inc. | 48 |
9 |
Caterpillar Inc. | 8877 |
8 |
Hyundai Motor Company | 19021 |
8 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
8 |
Ajax Tocco Magnethermic Corporation | 96 |
6 |
Aktiebolaget SKF | 2700 |
6 |
General Electric Company | 18133 |
5 |
The Boeing Company | 19843 |
5 |
Temper Corporation | 41 |
5 |
ThyssenKrupp Rasselstein GmbH | 72 |
5 |
Toshiba Mitsubishi-Electric Industrial Systems Corporation | 1583 |
5 |
Other owners | 347 |