- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 5/57 - Control of contrast or brightness
Patent holdings for IPC class H04N 5/57
Total number of patents in this class: 668
10-year publication summary
|
60
|
55
|
64
|
70
|
58
|
45
|
35
|
28
|
11
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Samsung Electronics Co., Ltd. | 155224 |
56 |
| LG Electronics Inc. | 75274 |
41 |
| Panasonic Intellectual Property Management Co., Ltd. | 33812 |
36 |
| Canon Inc. | 42633 |
26 |
| Dolby Laboratories Licensing Corporation | 4289 |
22 |
| Sharp Kabushiki Kaisha | 18585 |
15 |
| Apple Inc. | 58268 |
14 |
| Sony Corporation | 30327 |
14 |
| Saturn Licensing LLC | 1445 |
12 |
| Sharp Corporation | 10484 |
11 |
| Samsung Display Co., Ltd. | 38092 |
10 |
| Seiko Epson Corporation | 20081 |
10 |
| Microsoft Technology Licensing, LLC | 54289 |
10 |
| Boe Technology Group Co., Ltd. | 43343 |
10 |
| Huawei Technologies Co., Ltd. | 121192 |
9 |
| Koninklijke Philips N.V. | 25697 |
8 |
| Maxell, Ltd. | 2962 |
8 |
| Maxell Holdings, Ltd. | 1272 |
7 |
| International Business Machines Corporation | 62325 |
6 |
| Panasonic Intellectual Property Corporation of America | 7111 |
6 |
| Other owners | 337 |