- All sections
- H - Electricity
- H03F - Amplifiers
- H03F 3/217 - Class D power amplifiers; Switching amplifiers
Patent holdings for IPC class H03F 3/217
Total number of patents in this class: 2111
10-year publication summary
|
172
|
206
|
188
|
189
|
190
|
159
|
134
|
123
|
113
|
31
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cirrus Logic, Inc. | 1719 |
142 |
| Texas Instruments Incorporated | 19376 |
83 |
| Qualcomm Incorporated | 76576 |
72 |
| Cirrus Logic International Semiconductor Ltd. | 792 |
67 |
| NEC Corporation | 32703 |
54 |
| STMicroelectronics S.r.l. | 3693 |
41 |
| Skyworks Solutions, Inc. | 3450 |
41 |
| Yamaha Corporation | 4054 |
36 |
| Rohm Co., Ltd. | 5843 |
28 |
| Bose Corporation | 2880 |
27 |
| Samsung Electronics Co., Ltd. | 131630 |
25 |
| NXP B.V. | 2185 |
22 |
| NPX B.V. | 2204 |
21 |
| Panasonic Corporation | 20786 |
19 |
| Toshiba Corporation | 12017 |
18 |
| Psemi Corporation | 898 |
18 |
| Avago Technologies International Sales Pte. Limited | 9260 |
18 |
| Apple Inc. | 50209 |
17 |
| Infineon Technologies Austria AG | 1954 |
17 |
| Morgan Stanley Senior Funding, Inc., AS Agent | 1727 |
16 |
| Other owners | 1329 |