- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 21/8355 - Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
Patent holdings for IPC class H04N 21/8355
Total number of patents in this class: 338
10-year publication summary
|
43
|
31
|
26
|
22
|
23
|
27
|
6
|
24
|
12
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nagravision S.A. | 582 |
29 |
| Sonos, Inc. | 2641 |
16 |
| Comcast Cable Communications, LLC | 4740 |
13 |
| Adeia Guides Inc. | 3354 |
13 |
| Huawei Technologies Co., Ltd. | 113689 |
11 |
| Sony Corporation | 30936 |
9 |
| Microsoft Technology Licensing, LLC | 53891 |
9 |
| Samsung Electronics Co., Ltd. | 147501 |
8 |
| AT&T Intellectual Property I, L.P. | 9576 |
8 |
| Verizon Patent And Licensing Inc. | 7133 |
8 |
| The Nielsen Company (US), LLC | 2657 |
8 |
| Ericsson AB | 386 |
7 |
| ARRIS Enterprises LLC | 3475 |
6 |
| CrowdStrike, Inc. | 476 |
6 |
| Google LLC | 42540 |
6 |
| OpenTV, Inc. | 340 |
6 |
| Synamedia Limited | 340 |
6 |
| Panasonic Corporation | 20050 |
5 |
| DIRECTV, LLC | 781 |
5 |
| DivX, LLC | 297 |
5 |
| Other owners | 154 |