- 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: 339
10-year publication summary
|
26
|
43
|
31
|
27
|
22
|
23
|
28
|
6
|
22
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nagravision S.A. | 626 |
29 |
| Sonos, Inc. | 2274 |
14 |
| Comcast Cable Communications, LLC | 4075 |
13 |
| Huawei Technologies Co., Ltd. | 100781 |
12 |
| Rovi Guides, Inc. | 3236 |
12 |
| Sony Corporation | 32931 |
10 |
| AT&T Intellectual Property I, L.P. | 9886 |
9 |
| Samsung Electronics Co., Ltd. | 131630 |
8 |
| Verizon Patent And Licensing Inc. | 6900 |
8 |
| Microsoft Technology Licensing, LLC | 51439 |
8 |
| Time Warner Cable Enterprises LLC | 945 |
8 |
| Ericsson AB | 491 |
7 |
| The Nielsen Company (US), LLC | 2549 |
7 |
| Synamedia Limited | 354 |
7 |
| ARRIS Enterprises LLC | 3432 |
6 |
| DIRECTV, LLC | 812 |
6 |
| Google LLC | 38759 |
6 |
| Open Text SA ULC | 665 |
6 |
| Panasonic Corporation | 20786 |
5 |
| Netflix, Inc. | 944 |
5 |
| Other owners | 153 |