- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 1489
10-year publication summary
|
75
|
99
|
106
|
111
|
123
|
140
|
173
|
178
|
163
|
62
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2477 |
116 |
| AAC Technologies Pte. Ltd. | 1436 |
97 |
| Pioneer Corporation | 4843 |
87 |
| Tohoku Pioneer Corporation | 477 |
85 |
| AAC Microtech (Changzhou) Co., Ltd. | 458 |
73 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
60 |
| Apple Inc. | 50209 |
34 |
| LG Display Co., Ltd. | 11907 |
33 |
| Bose Corporation | 2880 |
29 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
27 |
| Sonos, Inc. | 2274 |
24 |
| Samsung Electronics Co., Ltd. | 131630 |
23 |
| PSS Belgium N.V. | 96 |
19 |
| Panasonic Corporation | 20786 |
18 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
17 |
| Yamaha Corporation | 4054 |
17 |
| Knowles Electronics, LLC | 597 |
15 |
| Clarion Co., Ltd. | 896 |
14 |
| Exelway Inc. | 16 |
14 |
| Google LLC | 38759 |
14 |
| Other owners | 673 |