H04N 21/4353
Involving decryption of additional data
Official title: {involving decryption of additional data (arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23)}
H04N21/4353 (Involving decryption of additional data) appears on 293 US grants and 268 published applications in this corpus.
Search patents in H04N- Granted patents
- 293
- Published applications
- 268
- Assignees
- 106
- Inventors
- 366
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 1 | 6 |
| 2003 | 0 | 2 |
| 2004 | 1 | 4 |
| 2005 | 1 | 10 |
| 2006 | 3 | 12 |
| 2007 | 5 | 14 |
| 2008 | 3 | 8 |
| 2009 | 5 | 7 |
| 2010 | 24 | 9 |
| 2011 | 20 | 43 |
| 2012 | 8 | 8 |
| 2013 | 19 | 8 |
| 2014 | 34 | 25 |
| 2015 | 30 | 20 |
| 2016 | 24 | 17 |
| 2017 | 15 | 20 |
| 2018 | 14 | 13 |
| 2019 | 17 | 9 |
| 2020 | 13 | 7 |
| 2021 | 8 | 7 |
| 2022 | 12 | 8 |
| 2023 | 5 | 3 |
| 2024 | 9 | 4 |
| 2025 | 2 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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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