- All sections
- H - Electricity
- H03G - Control of amplification
- H03G 9/18 - Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
Patent holdings for IPC class H03G 9/18
Total number of patents in this class: 37
10-year publication summary
|
3
|
7
|
1
|
2
|
6
|
2
|
3
|
1
|
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 |
13 |
| Dolby International AB | 1076 |
4 |
| Sony Corporation | 32931 |
2 |
| Yamaha Corporation | 4054 |
2 |
| Bongiovi Acoustics LLC. | 92 |
2 |
| BlackBerry Limited | 5958 |
1 |
| Koninklijke Philips Electronics N.V. | 13133 |
1 |
| Huawei Technologies Co., Ltd. | 100781 |
1 |
| HTC Corporation | 2219 |
1 |
| Microsoft Technology Licensing, LLC | 51439 |
1 |
| Arkamys | 34 |
1 |
| DTS, Inc. | 381 |
1 |
| ESS Technology, Inc. | 88 |
1 |
| Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America | 234 |
1 |
| Staton Techiya, LLC | 254 |
1 |
| GN Hearing A/S | 628 |
1 |
| Oshima, Kenichi | 1 |
1 |
| Avatar Investments, LLC | 5 |
1 |
| Dolby International AB | 422 |
1 |
| Other owners | 0 |