- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 3/02 - Circuits for transducers for preventing acoustic reaction
Patent holdings for IPC class H04R 3/02
Total number of patents in this class: 1176
10-year publication summary
|
79
|
86
|
85
|
95
|
119
|
105
|
109
|
78
|
62
|
30
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Samsung Electronics Co., Ltd. | 157946 |
60 |
| Shenzhen Shokz Co., Ltd. | 1413 |
58 |
| Yamaha Corporation | 4073 |
48 |
| Bose Corporation | 3092 |
33 |
| Dolby Laboratories Licensing Corporation | 4328 |
33 |
| Cirrus Logic, Inc. | 1804 |
32 |
| Microsoft Technology Licensing, LLC | 54463 |
26 |
| Qualcomm Incorporated | 92416 |
21 |
| Panasonic Intellectual Property Management Co., Ltd. | 34035 |
21 |
| Amazon Technologies, Inc. | 28118 |
20 |
| Knowles Electronics, LLC | 593 |
20 |
| Sony Corporation | 30158 |
19 |
| Harman International Industries, Incorporated | 2878 |
19 |
| Nippon Telegraph and Telephone Corporation | 15923 |
17 |
| BlackBerry Limited | 4893 |
16 |
| NEC Corporation | 37005 |
16 |
| Biamp Systems, LLC | 378 |
14 |
| Panasonic Corporation | 18962 |
11 |
| Hewlett-Packard Development Company, L.P. | 25180 |
11 |
| Google LLC | 44540 |
11 |
| Other owners | 670 |