- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 7/20 - Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Patent holdings for IPC class H04R 7/20
Total number of patents in this class: 345
10-year publication summary
|
37
|
34
|
30
|
37
|
11
|
23
|
19
|
30
|
17
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bose Corporation | 3095 |
28 |
| AAC Technologies Pte. Ltd. | 1505 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 34080 |
15 |
| Pioneer Corporation | 3779 |
13 |
| Tohoku Pioneer Corporation | 465 |
13 |
| PSS Belgium N.V. | 136 |
11 |
| Apple Inc. | 58936 |
9 |
| AAC Microtech (Changzhou) Co., Ltd. | 1033 |
8 |
| Knowles Electronics, LLC | 593 |
8 |
| Nokia Technologies Oy | 21366 |
7 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 2023 |
6 |
| Foster Electric Company, Limited | 203 |
6 |
| Shenzhen Luxshare Acoustics Technology Ltd. | 17 |
6 |
| Panasonic Automotive Systems Co., Ltd. | 2086 |
6 |
| Panasonic Corporation | 18951 |
5 |
| Devialet | 148 |
5 |
| Google LLC | 44565 |
5 |
| InvenSense, Inc. | 1208 |
5 |
| Sonos, Inc. | 2871 |
5 |
| Sony Corporation | 30139 |
4 |
| Other owners | 156 |