- All sections
- H - Electricity
- H03F - Amplifiers
- H03F 3/34 - DC amplifiers in which all stages are DC-coupled
Patent holdings for IPC class H03F 3/34
Total number of patents in this class: 84
10-year publication summary
|
1
|
4
|
9
|
11
|
8
|
3
|
2
|
4
|
1
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Panasonic Corporation | 18616 |
10 |
| Sony Semiconductor Solutions Corporation | 11994 |
10 |
| Mitsubishi Electric Corporation | 48460 |
8 |
| Azbil Corporation | 472 |
4 |
| NEC Corporation | 37532 |
3 |
| Semiconductor Energy Laboratory Co., Ltd. | 11896 |
3 |
| Knowles Electronics, LLC | 595 |
3 |
| Fujitsu Limited | 16810 |
2 |
| Alps Electric Co., Ltd. | 744 |
2 |
| NTT Electronics Corporation | 256 |
2 |
| Hioki E.E. Corporation | 168 |
2 |
| National Institute of Information and Communications Technology | 673 |
2 |
| Thine Electronics, Inc. | 144 |
2 |
| International Business Machines Corporation | 62864 |
1 |
| Sumitomo Electric Industries, Ltd. | 16437 |
1 |
| Denso Corporation | 25820 |
1 |
| Murata Manufacturing Co., Ltd. | 25998 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 34623 |
1 |
| Rohm Co., Ltd. | 6919 |
1 |
| Pioneer Corporation | 3725 |
1 |
| Other owners | 24 |