- 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: 778
10-year publication summary
|
66
|
55
|
90
|
82
|
67
|
49
|
32
|
23
|
16
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 36841 |
110 |
| Brother Industries, Ltd. | 13000 |
39 |
| Hewlett-Packard Development Company, L.P. | 28538 |
32 |
| Ricoh Company, Ltd. | 13266 |
32 |
| FUJIFILM Corporation | 27102 |
31 |
| Sony Corporation | 32931 |
24 |
| Xerox Corporation | 7503 |
23 |
| Seiko Epson Corporation | 18724 |
22 |
| Olympus Corporation | 13667 |
21 |
| Konica Minolta, Inc. | 8349 |
17 |
| Kyocera Document Solutions Inc. | 5295 |
17 |
| FUJIFILM Business Innovation Corp. | 7395 |
16 |
| NEC Corporation | 32703 |
15 |
| Sharp Kabushiki Kaisha | 18957 |
14 |
| Toshiba TEC Corporation | 3877 |
13 |
| Nikon Corporation | 7162 |
12 |
| Qualcomm Incorporated | 76576 |
11 |
| Toshiba Corporation | 12017 |
10 |
| EIZO Corporation | 259 |
10 |
| Eastman Kodak Company | 3444 |
9 |
| Other owners | 300 |