- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 319
10-year publication summary
|
24
|
35
|
37
|
34
|
30
|
37
|
11
|
21
|
19
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| AAC Technologies Pte. Ltd. | 1436 |
28 |
| Bose Corporation | 2880 |
27 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
14 |
| Pioneer Corporation | 4843 |
13 |
| Tohoku Pioneer Corporation | 477 |
13 |
| PSS Belgium N.V. | 96 |
12 |
| Apple Inc. | 50209 |
9 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
8 |
| Nokia Technologies Oy | 15057 |
7 |
| Knowles Electronics, LLC | 597 |
7 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
6 |
| AAC Microtech (Changzhou) Co., Ltd. | 458 |
6 |
| Panasonic Corporation | 20786 |
5 |
| InvenSense, Inc. | 1014 |
5 |
| Panasonic Automotive Systems Co., Ltd. | 1440 |
5 |
| Sony Corporation | 32931 |
4 |
| Robert Bosch GmbH | 40953 |
4 |
| Yamaha Corporation | 4054 |
4 |
| Harman International Industries, Incorporated | 2443 |
4 |
| Sennheiser electronic GmbH & Co. KG | 472 |
4 |
| Other owners | 134 |