- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 1/407 - Control or modification of tonal gradation or of extreme levels, e.g. background level
Patent holdings for IPC class H04N 1/407
Total number of patents in this class: 722
10-year publication summary
|
90
|
82
|
67
|
49
|
32
|
23
|
18
|
14
|
13
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 43817 |
110 |
| Brother Industries, Ltd. | 12831 |
36 |
| Hewlett-Packard Development Company, L.P. | 25184 |
30 |
| FUJIFILM Corporation | 30514 |
30 |
| Ricoh Company, Ltd. | 13342 |
29 |
| Sony Corporation | 30181 |
23 |
| Seiko Epson Corporation | 20256 |
20 |
| Xerox Corporation | 4391 |
18 |
| Kyocera Document Solutions Inc. | 6249 |
18 |
| Olympus Corporation | 12939 |
17 |
| Konica Minolta, Inc. | 9119 |
16 |
| FUJIFILM Business Innovation Corp. | 7918 |
16 |
| Sharp Kabushiki Kaisha | 18523 |
14 |
| NEC Corporation | 37004 |
12 |
| Toshiba TEC Corporation | 3908 |
12 |
| Qualcomm Incorporated | 92196 |
10 |
| EIZO Corporation | 280 |
10 |
| Toshiba Corporation | 12560 |
9 |
| Canon Kabushiki Kaisha | 7314 |
9 |
| Sharp Corporation | 10545 |
8 |
| Other owners | 275 |