- 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: 1679
10-year publication summary
|
99
|
106
|
111
|
123
|
140
|
177
|
180
|
173
|
197
|
69
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2652 |
122 |
| AAC Microtech (Changzhou) Co., Ltd. | 734 |
118 |
| AAC Technologies Pte. Ltd. | 1455 |
93 |
| Pioneer Corporation | 4390 |
87 |
| Tohoku Pioneer Corporation | 475 |
85 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1929 |
63 |
| LG Display Co., Ltd. | 13283 |
38 |
| Apple Inc. | 54577 |
37 |
| Shenzhen Shokz Co., Ltd. | 1088 |
36 |
| Panasonic Intellectual Property Management Co., Ltd. | 31084 |
30 |
| Bose Corporation | 2971 |
29 |
| Samsung Electronics Co., Ltd. | 144675 |
26 |
| Sonos, Inc. | 2565 |
26 |
| PSS Belgium N.V. | 115 |
21 |
| Foster Electric Company, Limited | 178 |
19 |
| Sound Solutions International (Zhenjiang) Co., Ltd. | 34 |
19 |
| Yamaha Corporation | 4094 |
18 |
| Google LLC | 41934 |
18 |
| Panasonic Automotive Systems Co., Ltd. | 1871 |
18 |
| Panasonic Corporation | 20149 |
17 |
| Other owners | 759 |