- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 7/22 - Clamping rim of diaphragm or cone against seating
Patent holdings for IPC class H04R 7/22
Total number of patents in this class: 76
10-year publication summary
|
4
|
9
|
5
|
13
|
11
|
3
|
1
|
10
|
2
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Pioneer Corporation | 4843 |
9 |
| Tohoku Pioneer Corporation | 477 |
9 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
6 |
| Murata Manufacturing Co., Ltd. | 22355 |
4 |
| AAC Technologies Pte. Ltd. | 1436 |
4 |
| Kyocera Corporation | 12735 |
3 |
| Harman International Industries, Incorporated | 2443 |
3 |
| Sony Corporation | 32931 |
2 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
2 |
| Sanyo Electric Co., Ltd. | 3926 |
2 |
| Foster Electric Company, Limited | 133 |
2 |
| Kaetel Systems GmbH | 33 |
2 |
| Agc, Inc. | 4029 |
2 |
| Bridgestone Corporation | 7067 |
1 |
| HTC Corporation | 2219 |
1 |
| Omron Corporation | 6968 |
1 |
| AAC Microtech (Changzhou) Co., Ltd. | 458 |
1 |
| Acer Incorporated | 1864 |
1 |
| Bose Corporation | 2880 |
1 |
| Other owners | 13 |