- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 2404
10-year publication summary
|
237
|
237
|
236
|
302
|
212
|
181
|
181
|
179
|
129
|
28
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2477 |
125 |
| Infineon Technologies AG | 8189 |
77 |
| Bose Corporation | 2880 |
63 |
| JPMorgan Chase Bank, National Association | 10964 |
53 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
52 |
| Knowles Electronics, LLC | 597 |
52 |
| Apple Inc. | 50209 |
47 |
| AAC Technologies Pte. Ltd. | 1436 |
46 |
| TDK Corporation | 6306 |
44 |
| Shenzhen Shokz Co., Ltd. | 629 |
31 |
| Robert Bosch GmbH | 40953 |
30 |
| Murata Manufacturing Co., Ltd. | 22355 |
30 |
| Panasonic Corporation | 20786 |
27 |
| FUJIFILM Corporation | 27102 |
25 |
| SAE Magnetics (H.K.) Ltd. | 355 |
25 |
| STMicroelectronics S.r.l. | 3693 |
25 |
| Hyundai Motor Company | 19021 |
24 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 36809 |
23 |
| DB HiTek Co., Ltd. | 359 |
22 |
| Headway Technologies, Inc. | 715 |
21 |
| Other owners | 1562 |