- 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: 1681
10-year publication summary
|
99
|
106
|
111
|
123
|
140
|
177
|
180
|
173
|
197
|
71
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2653 |
122 |
| AAC Microtech (Changzhou) Co., Ltd. | 735 |
118 |
| AAC Technologies Pte. Ltd. | 1455 |
93 |
| Pioneer Corporation | 4378 |
87 |
| Tohoku Pioneer Corporation | 476 |
85 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1933 |
63 |
| LG Display Co., Ltd. | 13389 |
38 |
| Apple Inc. | 54610 |
37 |
| Shenzhen Shokz Co., Ltd. | 1104 |
36 |
| Panasonic Intellectual Property Management Co., Ltd. | 31201 |
30 |
| Bose Corporation | 2980 |
29 |
| Samsung Electronics Co., Ltd. | 145025 |
26 |
| Sonos, Inc. | 2573 |
26 |
| PSS Belgium N.V. | 115 |
21 |
| Foster Electric Company, Limited | 180 |
19 |
| Sound Solutions International (Zhenjiang) Co., Ltd. | 34 |
19 |
| Yamaha Corporation | 4092 |
18 |
| Google LLC | 42004 |
18 |
| Panasonic Automotive Systems Co., Ltd. | 1881 |
18 |
| Panasonic Corporation | 20142 |
17 |
| Other owners | 761 |