- 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: 1491
10-year publication summary
|
192
|
257
|
221
|
168
|
175
|
136
|
150
|
114
|
69
|
23
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 38930 |
317 |
| FUJIFILM Business Innovation Corp. | 7556 |
140 |
| Kyocera Document Solutions Inc. | 5461 |
109 |
| Ricoh Company, Ltd. | 13190 |
106 |
| Brother Industries, Ltd. | 12937 |
103 |
| Sharp Corporation | 10254 |
73 |
| Hewlett-Packard Development Company, L.P. | 26164 |
65 |
| Konica Minolta, Inc. | 8606 |
53 |
| Toshiba TEC Corporation | 3736 |
52 |
| Xerox Corporation | 7035 |
38 |
| Toshiba Corporation | 12230 |
32 |
| Seiko Epson Corporation | 19131 |
19 |
| Lexmark International, Inc. | 1697 |
17 |
| PFU Limited | 744 |
12 |
| Konica Minolta Business Technologies, Inc. | 1455 |
10 |
| Bold Limited | 100 |
10 |
| etherFAX, LLC | 31 |
10 |
| Samsung Electronics Co., Ltd. | 141620 |
9 |
| Fujitsu Limited | 18297 |
8 |
| Intel Corporation | 46550 |
7 |
| Other owners | 301 |