- 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: 313
10-year publication summary
|
39
|
33
|
30
|
37
|
13
|
18
|
13
|
10
|
11
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nagravision S.A. | 626 |
40 |
| DISH Technologies L.L.C. | 1666 |
20 |
| Irdeto B.V. | 296 |
14 |
| Avago Technologies International Sales Pte. Limited | 9260 |
12 |
| Samsung Electronics Co., Ltd. | 131630 |
10 |
| Sony Corporation | 32931 |
10 |
| Nagrastar, LLC | 45 |
9 |
| Viaccess | 120 |
9 |
| LG Electronics Inc. | 69257 |
8 |
| Synamedia Limited | 354 |
8 |
| Time Warner Cable Enterprises LLC | 945 |
7 |
| DIRECTV, LLC | 812 |
6 |
| Maxell, Ltd. | 2533 |
6 |
| Nexstep, Inc. | 18 |
5 |
| International Business Machines Corporation | 60644 |
4 |
| Cox Communications, Inc. | 471 |
4 |
| OpenTV, Inc. | 346 |
4 |
| SmarDTV SA | 34 |
4 |
| Sony Europe Limited | 527 |
4 |
| Nagravision SARL | 137 |
4 |
| Other owners | 125 |