- 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: 341
10-year publication summary
|
37
|
34
|
30
|
37
|
11
|
23
|
19
|
30
|
17
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bose Corporation | 3065 |
29 |
| AAC Technologies Pte. Ltd. | 1490 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 32983 |
15 |
| Pioneer Corporation | 4032 |
13 |
| Tohoku Pioneer Corporation | 469 |
13 |
| PSS Belgium N.V. | 125 |
11 |
| Apple Inc. | 57166 |
9 |
| AAC Microtech (Changzhou) Co., Ltd. | 889 |
8 |
| Nokia Technologies Oy | 19787 |
7 |
| Knowles Electronics, LLC | 595 |
7 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1991 |
6 |
| Foster Electric Company, Limited | 189 |
6 |
| Shenzhen Luxshare Acoustics Technology Ltd. | 16 |
6 |
| Panasonic Automotive Systems Co., Ltd. | 2004 |
6 |
| Panasonic Corporation | 19874 |
5 |
| InvenSense, Inc. | 1204 |
5 |
| Sonos, Inc. | 2752 |
5 |
| Sony Corporation | 30588 |
4 |
| Robert Bosch GmbH | 43294 |
4 |
| Yamaha Corporation | 4068 |
4 |
| Other owners | 154 |