- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 21/278 - Content descriptor database or directory service for end-user access
Patent holdings for IPC class H04N 21/278
Total number of patents in this class: 373
10-year publication summary
|
34
|
41
|
79
|
58
|
30
|
55
|
30
|
26
|
23
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rovi Guides, Inc. | 3236 |
35 |
| Roku, Inc. | 1151 |
17 |
| DISH Technologies L.L.C. | 1666 |
15 |
| META Platforms, Inc. | 7514 |
15 |
| Samba TV, Inc. | 60 |
13 |
| Google LLC | 38759 |
12 |
| Sony Corporation | 32931 |
10 |
| Samsung Electronics Co., Ltd. | 131630 |
9 |
| STATS LLC | 189 |
8 |
| LG Electronics Inc. | 69257 |
6 |
| Amazon Technologies, Inc. | 24422 |
6 |
| Hulu, LLC | 434 |
6 |
| Comcast Cable Communications, LLC | 4075 |
6 |
| Sony Interactive Entertainment Inc. | 5162 |
6 |
| Rovi Product Corporation | 236 |
5 |
| International Business Machines Corporation | 60644 |
4 |
| AT&T Intellectual Property I, L.P. | 9886 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
4 |
| Microsoft Technology Licensing, LLC | 51439 |
4 |
| ARRIS Enterprises LLC | 3432 |
4 |
| Other owners | 184 |