H04N 21/2585
Generation of a revocation list
Official title: {Generation of a revocation list, e.g. of client devices involved in piracy acts}
H04N21/2585 (Generation of a revocation list) appears on 100 US grants and 142 published applications in this corpus.
Search patents in H04N- Granted patents
- 100
- Published applications
- 142
- Assignees
- 74
- Inventors
- 273
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 2 | 4 |
| 2004 | 2 | 9 |
| 2005 | 4 | 10 |
| 2006 | 1 | 14 |
| 2007 | 1 | 10 |
| 2008 | 4 | 11 |
| 2009 | 6 | 12 |
| 2010 | 3 | 11 |
| 2011 | 9 | 6 |
| 2012 | 9 | 7 |
| 2013 | 9 | 7 |
| 2014 | 3 | 6 |
| 2015 | 15 | 5 |
| 2016 | 2 | 3 |
| 2017 | 6 | 3 |
| 2018 | 1 | 3 |
| 2019 | 2 | 4 |
| 2020 | 8 | 4 |
| 2021 | 2 | 2 |
| 2022 | 3 | 3 |
| 2023 | 3 | 4 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Anti-piracy methods, devices, and systems17 Feb 2026US 12,556,547 B2Synamedia Limited
- System and method for preventing streaming infidelity11 Feb 2025US 12,225,254 B2
- Preserving transmission properties of real-time scenes in an environment when an increasing number of users join a session20 Aug 2024US 12,069,138 B2Cisco Technology, Inc.
- Preserving transmission properties of real-time scenes in an environment when an increasing number of users join a session13 Jun 2023US 11,677,840 B2Cisco Technology, Inc.
- Media data modification management system4 Apr 2023US 11,622,159 B2International Business Machines Corporation
- Machine-learned model-driven anti-piracy framework for content streaming systems9 Jul 2026US 2026/0197523 A1
- Anti-Piracy Methods, Devices, and Systems2 Nov 2023US 2023/0353582 A1Synamedia Limited
- System and method for preventing streaming infidelity26 Oct 2023US 2023/0345066 A1
- Preserving transmission properties of real-time scenes in an environment when an increasing number of users join a session12 Oct 2023US 2023/0328142 A1Cisco Technology, Inc.
- Sports betting apparatus and method26 Jan 2023US 2023/0024852 A1
Most cited
By later US patents
- Methods and apparatus for supporting transmission of streaming data296US 7,447,775 B1Cisco Technology, Inc. · 2008
- Method and apparatus for providing periodic subscription television services194US 5,604,528 AScientific-Atlanta, Inc. · 1997
- System for encrypting broadcast programs in the presence of compromised receiver devices188US 6,118,873 AInternational Business Machines Corporation · 2000
- Content guard system for copy protection of recordable media91US 6,832,319 B1Intel Corporation · 2004
- Contents distribution system66US 7,353,543 B2Matsushita Electric Industrial Co., Ltd. · 2008