- 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: 375
10-year publication summary
|
18
|
33
|
31
|
33
|
15
|
18
|
16
|
13
|
14
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 4976 |
54 |
| Nippon Steel Corporation | 6012 |
26 |
| Neturen Co., Ltd. | 194 |
20 |
| Aisin AW Co., Ltd. | 2364 |
13 |
| Honda Motor Co., Ltd. | 24866 |
10 |
| Aktiebolaget SKF | 2839 |
10 |
| ThyssenKrupp Rothe Erde GmbH | 65 |
9 |
| Caterpillar Inc. | 9166 |
7 |
| NSK Ltd. | 2738 |
7 |
| Nihon Parkerizing Co., Ltd. | 280 |
7 |
| Ajax Tocco Magnethermic Corporation | 94 |
6 |
| SMS Elotherm GmbH | 16 |
6 |
| Inductoheat, Inc. | 48 |
5 |
| Iowa State University Research Foundation, Inc. | 743 |
5 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
5 |
| Temper Corporation | 36 |
5 |
| University of Tennessee Research Foundation | 749 |
5 |
| UT-Battelle, LLC | 1391 |
5 |
| Eck Industries, Inc. | 20 |
5 |
| Illinois Tool Works Inc. | 11399 |
4 |
| Other owners | 161 |