- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 3/06 - Circuits for transducers for correcting frequency response of electrostatic transducers
Patent holdings for IPC class H04R 3/06
Total number of patents in this class: 158
10-year publication summary
|
12
|
24
|
27
|
25
|
20
|
13
|
7
|
10
|
3
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Knowles Electronics, LLC | 597 |
29 |
| Cirrus Logic, Inc. | 1719 |
13 |
| Infineon Technologies AG | 8189 |
10 |
| Cirrus Logic International Semiconductor Ltd. | 792 |
7 |
| InvenSense, Inc. | 1014 |
7 |
| Robert Bosch GmbH | 40953 |
6 |
| TDK Corporation | 6306 |
5 |
| STMicroelectronics S.r.l. | 3693 |
4 |
| audio-technica Corporation | 252 |
4 |
| Qualcomm Technologies, Inc. | 235 |
3 |
| Empire Technology Development LLC | 1636 |
3 |
| Shure Acquisition Holdings, Inc. | 449 |
3 |
| Samsung Electronics Co., Ltd. | 131630 |
2 |
| Analog Devices, Inc. | 3475 |
2 |
| Omron Corporation | 6968 |
2 |
| Akustica, Inc. | 25 |
2 |
| Bose Corporation | 2880 |
2 |
| BSE Co., Ltd. | 118 |
2 |
| Freedman Electronics Pty. Ltd. | 112 |
2 |
| Sennheiser electronic GmbH & Co. KG | 472 |
2 |
| Other owners | 48 |