- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 3/12 - Circuits for transducers for distributing signals to two or more loudspeakers
Patent holdings for IPC class H04R 3/12
Total number of patents in this class: 3420
10-year publication summary
|
288
|
349
|
358
|
355
|
336
|
359
|
313
|
300
|
304
|
183
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sonos, Inc. | 2871 |
380 |
| Samsung Electronics Co., Ltd. | 158156 |
208 |
| Bose Corporation | 3095 |
143 |
| Yamaha Corporation | 4076 |
119 |
| Apple Inc. | 58936 |
108 |
| Harman International Industries, Incorporated | 2876 |
89 |
| Dolby Laboratories Licensing Corporation | 4333 |
82 |
| Sony Corporation | 30139 |
74 |
| Amazon Technologies, Inc. | 28142 |
57 |
| Google LLC | 44565 |
45 |
| Biamp Systems, LLC | 378 |
43 |
| Microsoft Technology Licensing, LLC | 54464 |
42 |
| Qualcomm Incorporated | 92563 |
38 |
| Nokia Technologies Oy | 21366 |
35 |
| Huawei Technologies Co., Ltd. | 123677 |
34 |
| LG Electronics Inc. | 75845 |
32 |
| Roku, Inc. | 1611 |
29 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 5265 |
25 |
| D&M Holdings, Inc. | 213 |
25 |
| Panasonic Intellectual Property Management Co., Ltd. | 34080 |
23 |
| Other owners | 1789 |