- 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: 741
10-year publication summary
|
55
|
90
|
82
|
67
|
49
|
32
|
23
|
16
|
12
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 39660 |
109 |
| Brother Industries, Ltd. | 12966 |
36 |
| Hewlett-Packard Development Company, L.P. | 25910 |
31 |
| Ricoh Company, Ltd. | 13198 |
31 |
| FUJIFILM Corporation | 29295 |
28 |
| Sony Corporation | 31107 |
23 |
| Xerox Corporation | 7021 |
21 |
| Seiko Epson Corporation | 19316 |
18 |
| Olympus Corporation | 13187 |
18 |
| Kyocera Document Solutions Inc. | 5544 |
17 |
| Konica Minolta, Inc. | 8701 |
16 |
| FUJIFILM Business Innovation Corp. | 7580 |
15 |
| NEC Corporation | 35509 |
14 |
| Sharp Kabushiki Kaisha | 18781 |
14 |
| Toshiba TEC Corporation | 3783 |
13 |
| Qualcomm Incorporated | 84847 |
10 |
| Toshiba Corporation | 12317 |
10 |
| Nikon Corporation | 7168 |
10 |
| EIZO Corporation | 269 |
10 |
| Canon Kabushiki Kaisha | 7051 |
10 |
| Other owners | 287 |