- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 7/04 - Plane diaphragms
Patent holdings for IPC class H04R 7/04
Total number of patents in this class: 1732
10-year publication summary
|
89
|
143
|
138
|
200
|
146
|
136
|
157
|
159
|
123
|
74
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kyocera Corporation | 14404 |
152 |
| LG Display Co., Ltd. | 14966 |
113 |
| Goertek Inc. | 2827 |
64 |
| Google LLC | 44565 |
61 |
| AAC Microtech (Changzhou) Co., Ltd. | 1033 |
57 |
| Agc, Inc. | 5557 |
55 |
| Samsung Electronics Co., Ltd. | 158156 |
39 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 2023 |
36 |
| Murata Manufacturing Co., Ltd. | 25776 |
30 |
| AAC Technologies Pte. Ltd. | 1505 |
30 |
| Yamaha Corporation | 4076 |
27 |
| Sony Group Corporation | 15745 |
27 |
| Bose Corporation | 3095 |
26 |
| Samsung Display Co., Ltd. | 38721 |
24 |
| FUJIFILM Corporation | 30543 |
24 |
| Shenzhen Shokz Co., Ltd. | 1414 |
21 |
| Sony Corporation | 30139 |
20 |
| Apple Inc. | 58936 |
18 |
| University of Rochester | 1335 |
18 |
| Panasonic Intellectual Property Management Co., Ltd. | 34080 |
17 |
| Other owners | 873 |