- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
Patent holdings for IPC class C22C 30/02
Total number of patents in this class: 504
10-year publication summary
|
41
|
33
|
42
|
32
|
34
|
25
|
39
|
48
|
44
|
29
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6871 |
45 |
| Toshiba Corporation | 12560 |
11 |
| TDK Corporation | 6858 |
11 |
| Meidensha Corporation | 929 |
11 |
| Nippon Yakin Kogyo Co., Ltd. | 74 |
11 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
10 |
| Yokowo Co., Ltd. | 576 |
10 |
| VDM Metals International GmbH | 105 |
8 |
| Wieland-Werke AG | 355 |
8 |
| Seagate Technology LLC | 3960 |
7 |
| LG Electronics Inc. | 75694 |
6 |
| Mitsubishi Materials Corporation | 2472 |
6 |
| Sumitomo Metal Mining Co., Ltd. | 1974 |
6 |
| Proterial, Ltd. | 935 |
6 |
| Ishifuku Metal Industry Co., Ltd. | 41 |
5 |
| JX Nippon Mining & Metals Corporation | 1461 |
5 |
| SANYO Special Steel Co., Ltd. | 246 |
5 |
| Senju Metal Industry Co., Ltd. | 689 |
5 |
| TOKIN Corporation | 215 |
5 |
| Tokuriki Honten Co., Ltd. | 22 |
5 |
| Other owners | 318 |