- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 1071
10-year publication summary
|
76
|
67
|
79
|
86
|
85
|
95
|
117
|
100
|
103
|
30
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Samsung Electronics Co., Ltd. | 131630 |
51 |
| Yamaha Corporation | 4054 |
50 |
| Shenzhen Shokz Co., Ltd. | 629 |
46 |
| Cirrus Logic, Inc. | 1719 |
32 |
| Dolby Laboratories Licensing Corporation | 3883 |
30 |
| Bose Corporation | 2880 |
28 |
| Microsoft Technology Licensing, LLC | 51439 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
21 |
| Sony Corporation | 32931 |
20 |
| NEC Corporation | 32703 |
20 |
| Knowles Electronics, LLC | 597 |
20 |
| Qualcomm Incorporated | 76576 |
19 |
| Amazon Technologies, Inc. | 24422 |
19 |
| Nippon Telegraph and Telephone Corporation | 14195 |
17 |
| BlackBerry Limited | 5958 |
16 |
| Harman International Industries, Incorporated | 2443 |
15 |
| Apple Inc. | 50209 |
12 |
| Panasonic Corporation | 20786 |
12 |
| Biamp Systems, LLC | 213 |
12 |
| Hewlett-Packard Development Company, L.P. | 28538 |
11 |
| Other owners | 596 |