- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 9/04 - Construction, mounting, or centering of coil
Patent holdings for IPC class H04R 9/04
Total number of patents in this class: 1841
10-year publication summary
|
106
|
111
|
123
|
140
|
177
|
181
|
179
|
207
|
143
|
92
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| AAC Microtech (Changzhou) Co., Ltd. | 1023 |
144 |
| Goertek Inc. | 2821 |
126 |
| AAC Technologies Pte. Ltd. | 1505 |
93 |
| Pioneer Corporation | 3779 |
85 |
| Tohoku Pioneer Corporation | 467 |
84 |
| Shenzhen Shokz Co., Ltd. | 1410 |
66 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 2023 |
64 |
| LG Display Co., Ltd. | 14966 |
43 |
| Apple Inc. | 58742 |
41 |
| Samsung Electronics Co., Ltd. | 157719 |
32 |
| Panasonic Intellectual Property Management Co., Ltd. | 33997 |
30 |
| Bose Corporation | 3092 |
29 |
| Sonos, Inc. | 2859 |
27 |
| PSS Belgium N.V. | 133 |
26 |
| Harman International Industries, Incorporated | 2877 |
23 |
| Sound Solutions International (Zhenjiang) Co., Ltd. | 36 |
22 |
| Foster Electric Company, Limited | 198 |
21 |
| Huawei Technologies Co., Ltd. | 123385 |
20 |
| Google LLC | 44482 |
19 |
| Yamaha Corporation | 4074 |
18 |
| Other owners | 828 |