- 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: 491
10-year publication summary
|
65
|
58
|
64
|
45
|
37
|
48
|
52
|
31
|
32
|
26
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cirrus Logic, Inc. | 1803 |
42 |
| Cirrus Logic International Semiconductor Ltd. | 924 |
23 |
| Qualcomm Incorporated | 92859 |
18 |
| Texas Instruments Incorporated | 19640 |
16 |
| Infineon Technologies AG | 8410 |
14 |
| STMicroelectronics S.r.l. | 3368 |
13 |
| InvenSense, Inc. | 1209 |
13 |
| Sonos, Inc. | 2875 |
13 |
| STMicroelectronics (Shenzhen) R&D Co. Ltd | 111 |
10 |
| Samsung Electronics Co., Ltd. | 158442 |
8 |
| Crestron Electronics Inc. | 719 |
8 |
| Harman International Industries, Incorporated | 2884 |
8 |
| Lenbrook Industries Limited | 135 |
8 |
| Motorola Solutions, Inc. | 4581 |
7 |
| Realtek Semiconductor Corp. | 3513 |
7 |
| Biamp Systems, LLC | 378 |
7 |
| NPX B.V. | 2830 |
6 |
| ICEpower a/s | 37 |
6 |
| Apple Inc. | 59027 |
5 |
| Yamaha Corporation | 4083 |
5 |
| Other owners | 254 |