- 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: 3436
10-year publication summary
|
288
|
349
|
358
|
355
|
336
|
359
|
313
|
300
|
306
|
211
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sonos, Inc. | 2896 |
388 |
| Samsung Electronics Co., Ltd. | 159473 |
210 |
| Bose Corporation | 3108 |
135 |
| Yamaha Corporation | 4094 |
119 |
| Apple Inc. | 59414 |
108 |
| Harman International Industries, Incorporated | 2905 |
89 |
| Dolby Laboratories Licensing Corporation | 4391 |
83 |
| Sony Corporation | 29887 |
74 |
| Amazon Technologies, Inc. | 28333 |
57 |
| Google LLC | 44900 |
45 |
| Biamp Systems, LLC | 358 |
43 |
| Microsoft Technology Licensing, LLC | 54693 |
42 |
| Qualcomm Incorporated | 93847 |
39 |
| Nokia Technologies Oy | 21978 |
35 |
| Huawei Technologies Co., Ltd. | 125335 |
34 |
| LG Electronics Inc. | 76299 |
32 |
| Roku, Inc. | 1643 |
29 |
| D&M Holdings, Inc. | 214 |
25 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 5299 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 34623 |
23 |
| Other owners | 1802 |