- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 21/4623 - Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Patent holdings for IPC class H04N 21/4623
Total number of patents in this class: 311
10-year publication summary
|
33
|
30
|
36
|
13
|
17
|
13
|
10
|
11
|
10
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nagravision S.A. | 582 |
40 |
| DISH Technologies L.L.C. | 1608 |
20 |
| Irdeto B.V. | 310 |
14 |
| Samsung Electronics Co., Ltd. | 147501 |
11 |
| Sony Corporation | 30936 |
9 |
| Nagrastar, LLC | 45 |
9 |
| Viaccess | 105 |
9 |
| LG Electronics Inc. | 73531 |
8 |
| Maxell, Ltd. | 2822 |
8 |
| Avago Technologies International Sales Pte. Limited | 8714 |
8 |
| Nagravision SARL | 257 |
8 |
| Time Warner Cable Enterprises LLC | 891 |
7 |
| Synamedia Limited | 340 |
7 |
| DIRECTV, LLC | 781 |
6 |
| Nexstep, Inc. | 18 |
5 |
| OpenTV, Inc. | 340 |
5 |
| Cox Communications, Inc. | 480 |
4 |
| SmarDTV SA | 30 |
4 |
| Sony Interactive Entertainment Inc. | 5917 |
4 |
| Verizon Patent And Licensing Inc. | 7133 |
3 |
| Other owners | 122 |