- 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: 92
10-year publication summary
|
6
|
3
|
1
|
4
|
9
|
11
|
8
|
3
|
2
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Panasonic Corporation | 20786 |
10 |
| Sony Semiconductor Solutions Corporation | 8770 |
9 |
| Mitsubishi Electric Corporation | 43934 |
8 |
| NEC Corporation | 32703 |
5 |
| Azbil Corporation | 486 |
4 |
| Semiconductor Energy Laboratory Co., Ltd. | 10902 |
3 |
| Rohm Co., Ltd. | 5843 |
3 |
| NTT Electronics Corporation | 283 |
3 |
| Knowles Electronics, LLC | 597 |
3 |
| International Business Machines Corporation | 60644 |
2 |
| Fujitsu Limited | 19265 |
2 |
| Pioneer Corporation | 4843 |
2 |
| Alps Electric Co., Ltd. | 851 |
2 |
| Advantest Corporation | 1939 |
2 |
| Nippon Telegraph and Telephone Corporation | 14195 |
2 |
| National Institute of Advanced Industrial Science and Technology | 3677 |
2 |
| Asahi Kasei EMD Corporation | 73 |
2 |
| Hioki E.E. Corporation | 103 |
2 |
| National Institute of Information and Communications Technology | 594 |
2 |
| Thine Electronics, Inc. | 156 |
2 |
| Other owners | 22 |