- All sections
- H - Electricity
- H04S - Stereophonic systems
- H04S 3/02 - Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
Patent holdings for IPC class H04S 3/02
Total number of patents in this class: 562
10-year publication summary
|
35
|
66
|
74
|
46
|
80
|
51
|
38
|
39
|
14
|
9
|
| 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 |
152 |
| Dolby International AB | 1076 |
66 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 4569 |
60 |
| Nokia Technologies Oy | 15057 |
26 |
| Qualcomm Incorporated | 76576 |
19 |
| Dolby International AB | 422 |
16 |
| DTS, Inc. | 381 |
11 |
| Samsung Electronics Co., Ltd. | 131630 |
10 |
| Sonos, Inc. | 2274 |
10 |
| Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | 6132 |
9 |
| Koninklijke Philips N.V. | 22975 |
8 |
| Huawei Technologies Co., Ltd. | 100781 |
8 |
| Koninklijke Philips Electronics N.V. | 13133 |
7 |
| Google LLC | 38759 |
7 |
| Electronics and Telecommunications Research Institute | 8830 |
6 |
| Thomson Licensing | 4027 |
6 |
| Bose Corporation | 2880 |
6 |
| Gcoa Co., Ltd. | 27 |
6 |
| Orange S.A. | 1379 |
5 |
| Harman Becker Automotive Systems GmbH | 645 |
5 |
| Other owners | 119 |