- All sections
- H - Electricity
- H04S - Stereophonic systems
- H04S 5/02 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
Patent holdings for IPC class H04S 5/02
Total number of patents in this class: 449
10-year publication summary
|
56
|
39
|
38
|
27
|
12
|
11
|
10
|
12
|
9
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sony Corporation | 31157 |
72 |
| Pioneer Corporation | 4406 |
42 |
| Dolby Laboratories Licensing Corporation | 4088 |
42 |
| Yamaha Corporation | 4091 |
36 |
| Panasonic Corporation | 20180 |
25 |
| Samsung Electronics Co., Ltd. | 143812 |
23 |
| Dolby International AB | 1035 |
14 |
| Sharp Kabushiki Kaisha | 18813 |
12 |
| Sony Group Corporation | 13455 |
11 |
| JVC Kenwood Corporation | 2984 |
9 |
| Harman International Industries, Incorporated | 2601 |
9 |
| Dolby International AB | 611 |
9 |
| Matsushita Electric Industrial Co., Ltd. | 1871 |
6 |
| Clarion Co., Ltd. | 864 |
6 |
| Kronoton GmbH | 12 |
6 |
| LG Electronics Inc. | 72357 |
5 |
| Socionext Inc. | 1551 |
5 |
| Harman Becker Automotive Systems GmbH | 643 |
4 |
| Qualcomm Incorporated | 84335 |
3 |
| Huawei Technologies Co., Ltd. | 110803 |
3 |
| Other owners | 107 |