- 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 1/04 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
Patent holdings for IPC class C21D 1/04
Total number of patents in this class: 84
10-year publication summary
|
8
|
5
|
8
|
11
|
2
|
10
|
4
|
5
|
3
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Novelis Inc. | 769 |
11 |
| Gestamp HardTech AB | 104 |
4 |
| JFE Steel Corporation | 7074 |
4 |
| Nippon Steel Corporation | 6514 |
4 |
| Robert Bosch GmbH | 43096 |
2 |
| Ford Global Technologies, LLC | 20949 |
2 |
| Caterpillar Inc. | 9852 |
2 |
| Headway Technologies, Inc. | 693 |
2 |
| Universite Joseph Fourier - Grenoble 1 | 74 |
2 |
| Vacuumschmelze GmbH & Co. KG | 258 |
2 |
| Wuhan University of Technology | 200 |
2 |
| Centre National de La Recherche Scientifique (cnrs) | 3091 |
2 |
| Grando Invest Inc. VG | 2 |
2 |
| Toyota Motor Corporation | 33519 |
1 |
| The Boeing Company | 20186 |
1 |
| Eaton Corporation | 1812 |
1 |
| Hitachi, Ltd. | 15712 |
1 |
| Hitachi Metals, Ltd. | 1957 |
1 |
| Texas Instruments Incorporated | 19498 |
1 |
| Tokyo Electron Limited | 13155 |
1 |
| Other owners | 36 |