H04N 2005/91307
By adding a copy protection signal to the video signal
Official title: {by adding a copy protection signal to the video signal}
H04N2005/91307 (By adding a copy protection signal to the video signal) appears on 1,128 US grants and 986 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,128
- Published applications
- 986
- Assignees
- 262
- Inventors
- 1,360
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 9 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 17 | 0 |
| 1998 | 29 | 0 |
| 1999 | 29 | 0 |
| 2000 | 33 | 0 |
| 2001 | 50 | 37 |
| 2002 | 79 | 79 |
| 2003 | 60 | 80 |
| 2004 | 59 | 64 |
| 2005 | 42 | 102 |
| 2006 | 67 | 97 |
| 2007 | 64 | 109 |
| 2008 | 58 | 73 |
| 2009 | 49 | 52 |
| 2010 | 69 | 54 |
| 2011 | 78 | 44 |
| 2012 | 67 | 26 |
| 2013 | 40 | 25 |
| 2014 | 39 | 18 |
| 2015 | 18 | 16 |
| 2016 | 19 | 13 |
| 2017 | 6 | 23 |
| 2018 | 20 | 15 |
| 2019 | 14 | 15 |
| 2020 | 14 | 15 |
| 2021 | 12 | 11 |
| 2022 | 9 | 8 |
| 2023 | 12 | 4 |
| 2024 | 4 | 4 |
| 2025 | 8 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04N 2005/91335The copy protection signal being a watermarkIndexing code501
- H04N 2005/91328The copy protection signal being a copy management signalIndexing code414
- H04N 2005/91321The copy protection signal being a copy protection control signalIndexing code365
- H04N 2005/91314The copy protection signal being a pulse signal inserted in blanking intervalsIndexing code222
- H04N 2005/91342The copy protection signal being an authentication signalIndexing code136
- H04N 2005/9135By superimposing the spectrally spread copy protection signal onto the video signalIndexing code82
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Most cited
By later US patents
- Methods for surveying dissemination of proprietary empirical data1,132US 5,862,260 ADigimarc Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels1,021US 5,943,422 AIntertrust Technologies Corporation · 1999
- Watermark enabled video objects735US 6,411,725 B1Digimarc Corporation · 2002
- Network linking method using steganographically embedded data objects665US 5,841,978 ADigimarc Corporation · 1998