- 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: 2444
10-year publication summary
237
|
236
|
303
|
212
|
182
|
182
|
183
|
130
|
105
|
7
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Goertek Inc. | 2591 |
127 |
Infineon Technologies AG | 8137 |
77 |
Bose Corporation | 2921 |
63 |
AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1878 |
54 |
Knowles Electronics, LLC | 605 |
53 |
JPMorgan Chase Bank, National Association | 8416 |
47 |
Apple Inc. | 52750 |
46 |
AAC Technologies Pte. Ltd. | 1440 |
46 |
TDK Corporation | 6539 |
42 |
Shenzhen Shokz Co., Ltd. | 933 |
33 |
Robert Bosch GmbH | 41786 |
32 |
Murata Manufacturing Co., Ltd. | 23702 |
28 |
Panasonic Corporation | 20315 |
27 |
FUJIFILM Corporation | 28805 |
27 |
STMicroelectronics S.r.l. | 3654 |
27 |
Taiwan Semiconductor Manufacturing Company, Ltd. | 40608 |
26 |
SAE Magnetics (H.K.) Ltd. | 335 |
24 |
Hyundai Motor Company | 20483 |
24 |
AAC Microtech (Changzhou) Co., Ltd. | 630 |
22 |
Sonos, Inc. | 2462 |
22 |
Other owners | 1597 |