- All sections
- H - Electricity
- H03F - Amplifiers
- H03F 3/183 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
Patent holdings for IPC class H03F 3/183
Total number of patents in this class: 431
10-year publication summary
|
63
|
65
|
58
|
64
|
45
|
37
|
48
|
50
|
27
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cirrus Logic, Inc. | 1748 |
41 |
| Qualcomm Incorporated | 81865 |
17 |
| Cirrus Logic International Semiconductor Ltd. | 826 |
17 |
| STMicroelectronics S.r.l. | 3654 |
15 |
| Texas Instruments Incorporated | 19432 |
13 |
| Infineon Technologies AG | 8137 |
13 |
| STMicroelectronics (Shenzhen) R&D Co. Ltd | 107 |
10 |
| Sonos, Inc. | 2462 |
9 |
| Samsung Electronics Co., Ltd. | 139001 |
8 |
| TDK Corporation | 6539 |
7 |
| Motorola Solutions, Inc. | 4391 |
7 |
| Realtek Semiconductor Corp. | 3200 |
7 |
| Crestron Electronics Inc. | 672 |
7 |
| InvenSense, Inc. | 1028 |
7 |
| Biamp Systems, LLC | 230 |
7 |
| NPX B.V. | 2372 |
6 |
| ICEpower a/s | 35 |
6 |
| Apple Inc. | 52750 |
5 |
| Infineon Technologies Austria AG | 2067 |
5 |
| Yamaha Corporation | 4075 |
5 |
| Other owners | 219 |