- All sections
- H - Electricity
- H03F - Amplifiers
- H03F 3/185 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
Patent holdings for IPC class H03F 3/185
Total number of patents in this class: 257
10-year publication summary
|
48
|
30
|
29
|
24
|
15
|
20
|
14
|
6
|
6
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cirrus Logic, Inc. | 1801 |
42 |
| Cirrus Logic International Semiconductor Ltd. | 938 |
14 |
| Qualcomm Incorporated | 94096 |
10 |
| Texas Instruments Incorporated | 19641 |
10 |
| Bose Corporation | 3117 |
10 |
| Crestron Electronics Inc. | 724 |
8 |
| On-Bright Electronics (Shanghai) Co., Ltd. | 331 |
7 |
| Synaptics Incorporated | 1853 |
7 |
| Yamaha Corporation | 4097 |
5 |
| Logitech Europe S.A. | 1439 |
5 |
| Toshiba Corporation | 12761 |
4 |
| NPX B.V. | 2872 |
4 |
| Devialet | 144 |
4 |
| Knowles Electronics, LLC | 596 |
4 |
| Skyworks Solutions, Inc. | 4006 |
4 |
| STMicroelectronics (Shenzhen) R&D Co. Ltd | 111 |
4 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 49677 |
3 |
| Rohm Co., Ltd. | 6934 |
3 |
| ams AG | 768 |
3 |
| ESS Technology, Inc. | 74 |
3 |
| Other owners | 103 |