- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 1/44 - Secrecy systems
Patent holdings for IPC class H04N 1/44
Total number of patents in this class: 1507
10-year publication summary
|
192
|
257
|
221
|
168
|
175
|
136
|
150
|
113
|
69
|
40
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 39888 |
321 |
| FUJIFILM Business Innovation Corp. | 7590 |
141 |
| Kyocera Document Solutions Inc. | 5598 |
110 |
| Ricoh Company, Ltd. | 13247 |
106 |
| Brother Industries, Ltd. | 12974 |
106 |
| Sharp Corporation | 10237 |
74 |
| Hewlett-Packard Development Company, L.P. | 25895 |
66 |
| Konica Minolta, Inc. | 8729 |
53 |
| Toshiba TEC Corporation | 3790 |
52 |
| Xerox Corporation | 7013 |
38 |
| Toshiba Corporation | 12336 |
32 |
| Seiko Epson Corporation | 19352 |
19 |
| Lexmark International, Inc. | 1668 |
17 |
| PFU Limited | 742 |
12 |
| Konica Minolta Business Technologies, Inc. | 1419 |
10 |
| Bold Limited | 106 |
10 |
| etherFAX, LLC | 30 |
10 |
| Samsung Electronics Co., Ltd. | 146092 |
9 |
| Fujitsu Limited | 18351 |
8 |
| Intel Corporation | 46962 |
7 |
| Other owners | 306 |