- 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: 729
10-year publication summary
|
89
|
81
|
67
|
49
|
32
|
23
|
17
|
13
|
13
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 42224 |
112 |
| Brother Industries, Ltd. | 12873 |
36 |
| Ricoh Company, Ltd. | 13306 |
31 |
| Hewlett-Packard Development Company, L.P. | 25370 |
30 |
| FUJIFILM Corporation | 30210 |
30 |
| Sony Corporation | 30440 |
23 |
| Xerox Corporation | 4726 |
19 |
| Seiko Epson Corporation | 19988 |
19 |
| Olympus Corporation | 13016 |
18 |
| Kyocera Document Solutions Inc. | 6060 |
18 |
| Konica Minolta, Inc. | 9021 |
16 |
| FUJIFILM Business Innovation Corp. | 7844 |
16 |
| Sharp Kabushiki Kaisha | 18630 |
14 |
| NEC Corporation | 36611 |
12 |
| Toshiba TEC Corporation | 3897 |
12 |
| Qualcomm Incorporated | 90109 |
10 |
| EIZO Corporation | 277 |
10 |
| Canon Kabushiki Kaisha | 7206 |
10 |
| Toshiba Corporation | 12693 |
9 |
| Nikon Corporation | 7310 |
9 |
| Other owners | 275 |