- 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 1/38 - Heating by cathodic discharges
Patent holdings for IPC class C21D 1/38
Total number of patents in this class: 43
10-year publication summary
|
2
|
1
|
0
|
4
|
2
|
0
|
1
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7721 |
11 |
| California Institute of Technology | 4050 |
6 |
| Etxe-tar, S.A. | 63 |
4 |
| Oerlikon Surface Solutions AG, Pfaffikon | 564 |
2 |
| Laser Engineering Applications | 29 |
2 |
| Apple Inc. | 59629 |
1 |
| Siemens AG | 23946 |
1 |
| Robert Bosch GmbH | 44459 |
1 |
| Nitto Denko Corporation | 8654 |
1 |
| Aperam | 143 |
1 |
| Baoshan Iron & Steel Co., Ltd. | 1147 |
1 |
| Ecole Polytechnique Federale de Lausanne (epfl) | 1629 |
1 |
| Glassimetal Technology, Inc. | 25 |
1 |
| Hatch Ltd. | 220 |
1 |
| Longevity Engineering SA | 1 |
1 |
| MAHLE International GmbH | 2938 |
1 |
| MAHLE Metal Leve S/A | 156 |
1 |
| Saint-Gobain Glass France | 3246 |
1 |
| STIWA Holding GmbH | 41 |
1 |
| UChicago Argonne, LLC | 965 |
1 |
| Other owners | 3 |