G11B 20/00731
Involving a digital rights management system for enforcing a usage restriction
Official title: {involving a digital rights management system for enforcing a usage restriction}
G11B20/00731 (Involving a digital rights management system for enforcing a usage restriction) appears on 1,085 US grants and 1,277 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,085
- Published applications
- 1,277
- Assignees
- 276
- Inventors
- 1,598
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 23 | 0 |
| 2000 | 28 | 0 |
| 2001 | 31 | 23 |
| 2002 | 49 | 145 |
| 2003 | 60 | 135 |
| 2004 | 64 | 106 |
| 2005 | 42 | 130 |
| 2006 | 67 | 123 |
| 2007 | 78 | 147 |
| 2008 | 66 | 119 |
| 2009 | 68 | 94 |
| 2010 | 101 | 71 |
| 2011 | 78 | 38 |
| 2012 | 68 | 43 |
| 2013 | 60 | 25 |
| 2014 | 52 | 21 |
| 2015 | 38 | 20 |
| 2016 | 20 | 10 |
| 2017 | 12 | 6 |
| 2018 | 12 | 3 |
| 2019 | 8 | 6 |
| 2020 | 6 | 3 |
| 2021 | 6 | 2 |
| 2022 | 4 | 5 |
| 2023 | 2 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 20/00746Wherein the usage restriction can be expressed as a specific number670
- G11B 20/0084Wherein the usage restriction can be expressed as a specific time or248
- G11B 20/00818Wherein the usage restriction limits the signal quality126
- G11B 20/00739Wherein the usage restriction is associated with a specific geographical region93
- G11B 20/00847Wherein the usage restriction is defined by a licence file72
- G11B 20/00833Wherein the usage restriction limits the data access speed3
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Most cited
By later US patents
- Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels1,021US 5,943,422 AIntertrust Technologies Corporation · 1999
- System for controlling the distribution and use of composite digital works982US 5,638,443 AXerox Corporation · 1997
- Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management720US 6,658,568 B1Intertrust Technologies Corporation · 2003
- Systems and methods using cryptography to protect secure computing environments603US 6,157,721 AIntertrust Technologies Corporation · 2000
- Media content protection utilizing public key cryptography501US 6,550,011 B1Hewlett-Packard Development Company, L. P. · 2003