- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
Patent holdings for IPC class H04R 31/00
Total number of patents in this class: 2482
10-year publication summary
|
236
|
235
|
302
|
210
|
182
|
181
|
185
|
132
|
105
|
68
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2661 |
129 |
| Infineon Technologies AG | 8224 |
77 |
| Bose Corporation | 2999 |
65 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1939 |
56 |
| Knowles Electronics, LLC | 600 |
53 |
| AAC Technologies Pte. Ltd. | 1463 |
50 |
| Apple Inc. | 55174 |
48 |
| JPMorgan Chase Bank, National Association | 8565 |
47 |
| TDK Corporation | 6761 |
41 |
| Robert Bosch GmbH | 42705 |
33 |
| Shenzhen Shokz Co., Ltd. | 1119 |
33 |
| Murata Manufacturing Co., Ltd. | 24603 |
28 |
| AAC Microtech (Changzhou) Co., Ltd. | 754 |
28 |
| Panasonic Corporation | 20088 |
27 |
| FUJIFILM Corporation | 29437 |
27 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 42945 |
26 |
| STMicroelectronics S.r.l. | 3607 |
26 |
| Hyundai Motor Company | 22086 |
24 |
| SAE Magnetics (H.K.) Ltd. | 328 |
23 |
| Sonos, Inc. | 2627 |
22 |
| Other owners | 1619 |