- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 2795
10-year publication summary
|
148
|
222
|
288
|
349
|
358
|
355
|
334
|
351
|
291
|
100
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sonos, Inc. | 2274 |
306 |
| Bose Corporation | 2880 |
128 |
| Yamaha Corporation | 4054 |
124 |
| Samsung Electronics Co., Ltd. | 131630 |
111 |
| Apple Inc. | 50209 |
95 |
| Sony Corporation | 32931 |
75 |
| Dolby Laboratories Licensing Corporation | 3883 |
68 |
| Harman International Industries, Incorporated | 2443 |
60 |
| Amazon Technologies, Inc. | 24422 |
48 |
| Microsoft Technology Licensing, LLC | 51439 |
40 |
| Google LLC | 38759 |
36 |
| Nokia Technologies Oy | 15057 |
33 |
| Biamp Systems, LLC | 213 |
32 |
| Qualcomm Incorporated | 76576 |
30 |
| Huawei Technologies Co., Ltd. | 100781 |
26 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 4569 |
26 |
| Roku, Inc. | 1151 |
25 |
| Pioneer Corporation | 4843 |
23 |
| B & W Group Ltd | 344 |
19 |
| Boomcloud 360 Inc. | 69 |
19 |
| Other owners | 1471 |