- All sections
- H - Electricity
- H04S - Stereophonic systems
- H04S 3/00 - Systems employing more than two channels, e.g. quadraphonic
Patent holdings for IPC class H04S 3/00
Total number of patents in this class: 2939
10-year publication summary
|
169
|
203
|
226
|
309
|
371
|
320
|
258
|
255
|
221
|
68
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Dolby Laboratories Licensing Corporation | 3883 |
392 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 4569 |
190 |
| Nokia Technologies Oy | 15057 |
146 |
| Dolby International AB | 1076 |
143 |
| Samsung Electronics Co., Ltd. | 131630 |
121 |
| Qualcomm Incorporated | 76576 |
117 |
| Huawei Technologies Co., Ltd. | 100781 |
82 |
| Sony Corporation | 32931 |
77 |
| Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | 6132 |
69 |
| Sonos, Inc. | 2274 |
55 |
| Bose Corporation | 2880 |
54 |
| Dolby International AB | 422 |
54 |
| Apple Inc. | 50209 |
51 |
| LG Electronics Inc. | 69257 |
50 |
| Electronics and Telecommunications Research Institute | 8830 |
49 |
| Harman International Industries, Incorporated | 2443 |
47 |
| DTS, Inc. | 381 |
46 |
| Yamaha Corporation | 4054 |
43 |
| Magic Leap, Inc. | 3028 |
37 |
| Koninklijke Philips Electronics N.V. | 13133 |
32 |
| Other owners | 1084 |