- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 7/02 - Diaphragms for electromechanical transducers; Cones characterised by the construction
Patent holdings for IPC class H04R 7/02
Total number of patents in this class: 474
10-year publication summary
|
39
|
40
|
48
|
25
|
42
|
29
|
37
|
51
|
41
|
14
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2477 |
31 |
| Agc, Inc. | 4029 |
22 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
19 |
| Pioneer Corporation | 4843 |
19 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
18 |
| AAC Technologies Pte. Ltd. | 1436 |
16 |
| Samsung Electronics Co., Ltd. | 131630 |
15 |
| Panasonic Corporation | 20786 |
15 |
| Tohoku Pioneer Corporation | 477 |
14 |
| Yamaha Corporation | 4054 |
12 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
11 |
| Infineon Technologies AG | 8189 |
8 |
| Knowles Electronics, LLC | 597 |
8 |
| Mogami Denki Corporation | 11 |
8 |
| Apple Inc. | 50209 |
6 |
| LG Electronics Inc. | 69257 |
6 |
| Foster Electric Company, Limited | 133 |
6 |
| Brane Audio, LLC | 46 |
6 |
| AAC Microtech (Changzhou) Co., Ltd. | 458 |
5 |
| Bose Corporation | 2880 |
5 |
| Other owners | 224 |