H04N 21/2351
Involving encryption of additional data
Official title: {involving encryption of additional data (arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23)}
H04N21/2351 (Involving encryption of additional data) appears on 313 US grants and 270 published applications in this corpus.
Search patents in H04N- Granted patents
- 313
- Published applications
- 270
- Assignees
- 130
- Inventors
- 429
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 7 |
| 2003 | 0 | 3 |
| 2004 | 3 | 4 |
| 2005 | 3 | 9 |
| 2006 | 3 | 7 |
| 2007 | 4 | 12 |
| 2008 | 3 | 7 |
| 2009 | 4 | 10 |
| 2010 | 22 | 7 |
| 2011 | 18 | 7 |
| 2012 | 12 | 13 |
| 2013 | 21 | 11 |
| 2014 | 26 | 17 |
| 2015 | 16 | 16 |
| 2016 | 21 | 15 |
| 2017 | 14 | 28 |
| 2018 | 18 | 13 |
| 2019 | 27 | 18 |
| 2020 | 17 | 17 |
| 2021 | 11 | 12 |
| 2022 | 13 | 7 |
| 2023 | 11 | 11 |
| 2024 | 12 | 10 |
| 2025 | 10 | 6 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Managing encryption keys for content29 Sep 2026US 12,750,208 B2Comcast Cable Communications, LLC
- Secure digital data collection24 Mar 2026US 12,585,830 B2Imagekeeper LLC
- Metadata distribution and management via transactional blockchain technology11 Nov 2025US 12,470,783 B2Adeia Guides Inc.
- System, method, and apparatus for generating tokenized images23 Sep 2025US 12,423,872 B2Visa International Service Association
- Methods and apparatus to collect distributed user information for media impressions and search terms22 Jul 2025US 12,367,318 B2The Nielsen Company (US), LLC
- Video stream authentication16 Jul 2026US 2026/0205467 A1Arranged BV
- Systems and Methods for Secure Playback of Encrypted Elementary Bitstreams30 Apr 2026US 2026/0122321 A1Divx, LLC
- Methods and apparatus to collect distributed user information for media impressions and search terms9 Oct 2025US 2025/0315556 A1The Nielsen Company (US), LLC
- Custom data indicating nominal range of samples of media content14 Aug 2025US 2025/0260851 A1Microsoft Technology Licensing, LLC
- Secure and privacy preserving server-to-server content distribution3 Jul 2025US 2025/0217454 A1Google Inc.
Most cited
By later US patents
- Signal processing apparatus and methods832US 4,694,490 A1987
- Signal processing appparatus and methods797US 5,335,277 AThe Personalized Mass Media Corporation · 1994
- Signal processing apparatus and methods615US 4,965,825 AThe Personalized Mass Media Corporation · 1990
- Signal processing apparatus and methods594US 4,704,725 A1987
- Signal processing apparatus and methods470US 5,233,654 AThe Personalized Mass Media Corporation · 1993