- 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: 239
10-year publication summary
|
35
|
27
|
48
|
30
|
29
|
24
|
15
|
19
|
12
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cirrus Logic, Inc. | 1719 |
40 |
| Bose Corporation | 2880 |
10 |
| Qualcomm Incorporated | 76576 |
8 |
| Cirrus Logic International Semiconductor Ltd. | 792 |
8 |
| On-Bright Electronics (Shanghai) Co., Ltd. | 326 |
8 |
| Texas Instruments Incorporated | 19376 |
7 |
| Crestron Electronics Inc. | 649 |
7 |
| Synaptics Incorporated | 1598 |
7 |
| Yamaha Corporation | 4054 |
5 |
| Toshiba Corporation | 12017 |
4 |
| NPX B.V. | 2204 |
4 |
| Knowles Electronics, LLC | 597 |
4 |
| Logitech Europe S.A. | 1188 |
4 |
| STMicroelectronics (Shenzhen) R&D Co. Ltd | 107 |
4 |
| Rohm Co., Ltd. | 5843 |
3 |
| STMicroelectronics S.r.l. | 3693 |
3 |
| ams AG | 807 |
3 |
| Devialet | 142 |
3 |
| ESS Technology, Inc. | 88 |
3 |
| Harman International Industries, Incorporated | 2443 |
3 |
| Other owners | 101 |