- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 21/02 - Microphones
Patent holdings for IPC class H04R 21/02
Total number of patents in this class: 93
10-year publication summary
|
12
|
6
|
6
|
2
|
4
|
5
|
2
|
3
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| InvenSense, Inc. | 1028 |
5 |
| Toshiba Corporation | 12043 |
3 |
| Hewlett-Packard Development Company, L.P. | 27473 |
3 |
| TDK Corporation | 6535 |
3 |
| Cirrus Logic, Inc. | 1749 |
3 |
| Kabushiki Kaisha Audio-Technica | 137 |
3 |
| LG Electronics Inc. | 70957 |
2 |
| Robert Bosch GmbH | 41765 |
2 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 40583 |
2 |
| STMicroelectronics S.r.l. | 3657 |
2 |
| JVC Kenwood Corporation | 2920 |
2 |
| Fortemedia, Inc. | 144 |
2 |
| Knowles Electronics, LLC | 605 |
2 |
| Shandong Gettop Acoustic Co., Ltd. | 23 |
2 |
| The University of Tokyo | 4055 |
2 |
| MMI Semiconductor Co., Ltd. | 69 |
2 |
| META Platforms Technologies, LLC | 5351 |
2 |
| Disney Enterprises, Inc. | 6051 |
1 |
| Sony Corporation | 31550 |
1 |
| International Business Machines Corporation | 60095 |
1 |
| Other owners | 48 |