- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 21/222 - Secondary servers, e.g. proxy server or cable television Head-end
Patent holdings for IPC class H04N 21/222
Total number of patents in this class: 932
10-year publication summary
|
118
|
113
|
118
|
106
|
100
|
90
|
74
|
81
|
48
|
15
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| AT&T Intellectual Property I, L.P. | 9886 |
39 |
| Comcast Cable Communications, LLC | 4075 |
36 |
| Time Warner Cable Enterprises LLC | 945 |
35 |
| ARRIS Enterprises LLC | 3432 |
33 |
| Broadband Itv, Inc. | 71 |
30 |
| Google LLC | 38759 |
19 |
| Roku, Inc. | 1151 |
19 |
| LG Electronics Inc. | 69257 |
18 |
| DIRECTV, LLC | 812 |
18 |
| Samsung Electronics Co., Ltd. | 131630 |
16 |
| DISH Technologies L.L.C. | 1666 |
15 |
| Cisco Technology, Inc. | 18858 |
14 |
| Huawei Technologies Co., Ltd. | 100781 |
13 |
| Verizon Patent And Licensing Inc. | 6900 |
12 |
| Nagravision S.A. | 626 |
10 |
| TiVo Corporation | 462 |
10 |
| Grass Valley Canada | 242 |
9 |
| Level 3 Communications, LLC | 1428 |
9 |
| Charter Communications Operating, LLC | 1054 |
8 |
| DISH Network L.L.C. | 746 |
8 |
| Other owners | 561 |