- 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: 338
10-year publication summary
|
35
|
37
|
34
|
30
|
37
|
11
|
23
|
19
|
28
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bose Corporation | 3024 |
29 |
| AAC Technologies Pte. Ltd. | 1471 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 32352 |
15 |
| Pioneer Corporation | 4170 |
13 |
| Tohoku Pioneer Corporation | 470 |
13 |
| PSS Belgium N.V. | 122 |
11 |
| Apple Inc. | 56211 |
9 |
| AAC Microtech (Changzhou) Co., Ltd. | 802 |
8 |
| Nokia Technologies Oy | 19120 |
7 |
| Knowles Electronics, LLC | 598 |
7 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1962 |
6 |
| Foster Electric Company, Limited | 185 |
6 |
| Panasonic Automotive Systems Co., Ltd. | 1986 |
6 |
| Panasonic Corporation | 19969 |
5 |
| InvenSense, Inc. | 1063 |
5 |
| Shenzhen Luxshare Acoustics Technology Ltd. | 15 |
5 |
| Sonos, Inc. | 2701 |
5 |
| Sony Corporation | 30805 |
4 |
| Robert Bosch GmbH | 43034 |
4 |
| Yamaha Corporation | 4061 |
4 |
| Other owners | 152 |