- 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: 324
10-year publication summary
|
31
|
27
|
22
|
23
|
28
|
6
|
25
|
13
|
9
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nagravision S.A. | 531 |
27 |
| Sonos, Inc. | 2812 |
16 |
| Comcast Cable Communications, LLC | 5091 |
12 |
| Adeia Guides Inc. | 3823 |
10 |
| Sony Corporation | 30327 |
9 |
| Microsoft Technology Licensing, LLC | 54289 |
9 |
| Samsung Electronics Co., Ltd. | 155224 |
8 |
| AT&T Intellectual Property I, L.P. | 9905 |
8 |
| Verizon Patent And Licensing Inc. | 7523 |
8 |
| The Nielsen Company (US), LLC | 2676 |
8 |
| Ericsson AB | 354 |
7 |
| ARRIS Enterprises LLC | 3421 |
6 |
| DivX, LLC | 300 |
6 |
| Google LLC | 44062 |
6 |
| OpenTV, Inc. | 339 |
6 |
| Synamedia Limited | 325 |
6 |
| Panasonic Corporation | 19386 |
5 |
| Huawei Technologies Co., Ltd. | 121192 |
5 |
| Netflix, Inc. | 1289 |
5 |
| Time Warner Cable Enterprises LLC | 858 |
5 |
| Other owners | 152 |