- 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: 1141
10-year publication summary
|
67
|
79
|
86
|
85
|
95
|
118
|
104
|
108
|
75
|
35
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Samsung Electronics Co., Ltd. | 144426 |
58 |
| Shenzhen Shokz Co., Ltd. | 1083 |
58 |
| Yamaha Corporation | 4096 |
52 |
| Cirrus Logic, Inc. | 1769 |
33 |
| Dolby Laboratories Licensing Corporation | 4098 |
33 |
| Bose Corporation | 2970 |
32 |
| Microsoft Technology Licensing, LLC | 53545 |
25 |
| Panasonic Intellectual Property Management Co., Ltd. | 31022 |
21 |
| Qualcomm Incorporated | 84634 |
20 |
| Amazon Technologies, Inc. | 26519 |
20 |
| Knowles Electronics, LLC | 600 |
20 |
| Sony Corporation | 31138 |
19 |
| NEC Corporation | 35424 |
19 |
| Nippon Telegraph and Telephone Corporation | 17207 |
18 |
| BlackBerry Limited | 5165 |
16 |
| Harman International Industries, Incorporated | 2615 |
16 |
| Biamp Systems, LLC | 237 |
13 |
| Panasonic Corporation | 20166 |
12 |
| Hewlett-Packard Development Company, L.P. | 25940 |
11 |
| Apple Inc. | 54527 |
10 |
| Other owners | 635 |