- 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: 1459
10-year publication summary
|
129
|
191
|
257
|
221
|
168
|
175
|
136
|
151
|
113
|
44
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 37031 |
304 |
| FUJIFILM Business Innovation Corp. | 7219 |
137 |
| Kyocera Document Solutions Inc. | 5104 |
108 |
| Ricoh Company, Ltd. | 13066 |
104 |
| Brother Industries, Ltd. | 12862 |
98 |
| Sharp Corporation | 9668 |
67 |
| Hewlett-Packard Development Company, L.P. | 27689 |
66 |
| Toshiba TEC Corporation | 3863 |
52 |
| Konica Minolta, Inc. | 8382 |
52 |
| Xerox Corporation | 7150 |
38 |
| Toshiba Corporation | 11880 |
33 |
| Seiko Epson Corporation | 18644 |
19 |
| Lexmark International, Inc. | 1730 |
12 |
| PFU Limited | 716 |
12 |
| Konica Minolta Business Technologies, Inc. | 1497 |
10 |
| etherFAX, LLC | 31 |
10 |
| Samsung Electronics Co., Ltd. | 135249 |
9 |
| Bold Limited | 92 |
9 |
| Fujitsu Limited | 18860 |
8 |
| Intel Corporation | 45809 |
7 |
| Other owners | 304 |