- 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: 1808
10-year publication summary
|
106
|
111
|
123
|
140
|
177
|
181
|
179
|
203
|
142
|
56
|
| 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. | 935 |
139 |
| Goertek Inc. | 2788 |
124 |
| AAC Technologies Pte. Ltd. | 1495 |
93 |
| Pioneer Corporation | 3837 |
86 |
| Tohoku Pioneer Corporation | 469 |
85 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 2009 |
64 |
| Shenzhen Shokz Co., Ltd. | 1352 |
61 |
| Apple Inc. | 58181 |
41 |
| LG Display Co., Ltd. | 14323 |
41 |
| Samsung Electronics Co., Ltd. | 154406 |
31 |
| Panasonic Intellectual Property Management Co., Ltd. | 33634 |
30 |
| Bose Corporation | 3091 |
29 |
| Sonos, Inc. | 2803 |
27 |
| PSS Belgium N.V. | 130 |
24 |
| Harman International Industries, Incorporated | 2811 |
21 |
| Sound Solutions International (Zhenjiang) Co., Ltd. | 35 |
21 |
| Huawei Technologies Co., Ltd. | 120661 |
20 |
| Foster Electric Company, Limited | 194 |
20 |
| Google LLC | 43952 |
19 |
| Yamaha Corporation | 4068 |
18 |
| Other owners | 814 |