- 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: 421
10-year publication summary
|
27
|
63
|
65
|
58
|
64
|
45
|
37
|
49
|
46
|
9
|
| 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 |
| Cirrus Logic International Semiconductor Ltd. | 792 |
18 |
| Sonos, Inc. | 2274 |
16 |
| STMicroelectronics S.r.l. | 3693 |
15 |
| Qualcomm Incorporated | 76576 |
14 |
| Infineon Technologies AG | 8189 |
12 |
| Texas Instruments Incorporated | 19376 |
10 |
| STMicroelectronics (Shenzhen) R&D Co. Ltd | 107 |
10 |
| Samsung Electronics Co., Ltd. | 131630 |
8 |
| TDK Corporation | 6306 |
7 |
| Motorola Solutions, Inc. | 4355 |
7 |
| Realtek Semiconductor Corp. | 3028 |
7 |
| Crestron Electronics Inc. | 649 |
7 |
| InvenSense, Inc. | 1014 |
7 |
| Biamp Systems, LLC | 213 |
7 |
| NPX B.V. | 2204 |
6 |
| Apple Inc. | 50209 |
5 |
| Infineon Technologies Austria AG | 1954 |
5 |
| Yamaha Corporation | 4054 |
5 |
| Harman International Industries, Incorporated | 2443 |
5 |
| Other owners | 210 |