- All sections
- H - Electricity
- H04H - Broadcast communication
- H04H 20/89 - Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
Patent holdings for IPC class H04H 20/89
Total number of patents in this class: 38
10-year publication summary
|
4
|
6
|
0
|
3
|
4
|
2
|
0
|
2
|
2
|
0
|
| 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 |
9 |
| Qualcomm Incorporated | 76576 |
5 |
| Nokia Technologies Oy | 15057 |
4 |
| Electronics and Telecommunications Research Institute | 8830 |
3 |
| Thomson Licensing | 4027 |
3 |
| Samsung Electronics Co., Ltd. | 131630 |
2 |
| Bose Corporation | 2880 |
2 |
| Honda Motor Co., Ltd. | 24537 |
1 |
| Panasonic Corporation | 20786 |
1 |
| Dolby International AB | 1076 |
1 |
| Google LLC | 38759 |
1 |
| Hamburg Innovation GmbH | 22 |
1 |
| Helmut Schmidt Universitat, Universitat der Bundeswehr Hamburg | 26 |
1 |
| Morgan Stanley Senior Funding, Inc., AS Agent | 1727 |
1 |
| Nordic Capital Partners, LLC | 2 |
1 |
| Wisa Technologies, Inc. | 20 |
1 |
| Dolby International AB | 422 |
1 |
| Other owners | 0 |