- 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 1/10 - Surface hardening by direct application of electrical or wave energySurface hardening by particle radiation by electric induction
Patent holdings for IPC class C21D 1/10
Total number of patents in this class: 369
10-year publication summary
|
18
|
32
|
30
|
33
|
15
|
14
|
16
|
14
|
14
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 4964 |
53 |
| Nippon Steel Corporation | 6321 |
26 |
| Neturen Co., Ltd. | 198 |
20 |
| Aisin AW Co., Ltd. | 2324 |
12 |
| Honda Motor Co., Ltd. | 25379 |
10 |
| Aktiebolaget SKF | 2970 |
10 |
| ThyssenKrupp Rothe Erde GmbH | 66 |
9 |
| Caterpillar Inc. | 9604 |
7 |
| NSK Ltd. | 2790 |
7 |
| Nihon Parkerizing Co., Ltd. | 289 |
7 |
| Ajax Tocco Magnethermic Corporation | 98 |
6 |
| SMS Elotherm GmbH | 15 |
6 |
| Inductoheat, Inc. | 49 |
5 |
| Iowa State University Research Foundation, Inc. | 784 |
5 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
5 |
| Temper Corporation | 34 |
5 |
| University of Tennessee Research Foundation | 751 |
5 |
| UT-Battelle, LLC | 1465 |
5 |
| Eck Industries, Inc. | 21 |
5 |
| Illinois Tool Works Inc. | 11492 |
4 |
| Other owners | 157 |