H04N 21/835
Generation of protective data
Official title: Generation of protective data, e.g. certificates {(protecting software against unauthorised usage in a vending or licensing environment G06F21/10)}
H04N21/835 (Generation of protective data) appears on 4,814 US grants and 5,955 published applications in this corpus.
Search patents in H04N- Granted patents
- 4,814
- Published applications
- 5,955
- Assignees
- 1,154
- Inventors
- 7,008
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 9 | 0 |
| 1997 | 13 | 0 |
| 1998 | 15 | 0 |
| 1999 | 26 | 0 |
| 2000 | 28 | 0 |
| 2001 | 61 | 57 |
| 2002 | 49 | 220 |
| 2003 | 63 | 227 |
| 2004 | 80 | 221 |
| 2005 | 73 | 255 |
| 2006 | 138 | 302 |
| 2007 | 108 | 333 |
| 2008 | 130 | 298 |
| 2009 | 140 | 254 |
| 2010 | 244 | 294 |
| 2011 | 201 | 198 |
| 2012 | 238 | 242 |
| 2013 | 264 | 241 |
| 2014 | 331 | 377 |
| 2015 | 273 | 262 |
| 2016 | 255 | 245 |
| 2017 | 265 | 240 |
| 2018 | 229 | 216 |
| 2019 | 214 | 203 |
| 2020 | 224 | 253 |
| 2021 | 241 | 233 |
| 2022 | 233 | 194 |
| 2023 | 232 | 205 |
| 2024 | 191 | 166 |
| 2025 | 150 | 136 |
| 2026 | 79 | 83 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and apparatus to detect a presence status6 Oct 2026US 12,756,897 B2The Nielsen Company (US), LLC
- Methods and apparatus to determine sources of media presentations22 Sep 2026US 12,743,462 B2The Nielsen Company (US), LLC
- Systems and methods for causing a user to view secondary content that relates to a media asset from which a user has switched away22 Sep 2026US 12,744,948 B2Adeia Guides Inc.
- Synchronized interleaved watermarking25 Aug 2026US 12,720,133 B2Synamedia Limited
- Systems and methods for automated extraction of closed captions in real time or near real-time and tagging of streaming data for advertisements25 Aug 2026US 12,720,139 B2Crossbar Media Group, Inc
- Monitoring streaming media content8 Oct 2026US 2026/0312894 A1The Nielsen Company (US), LLC
- Methods and apparatus to identify media for ahead of time watermark encoding8 Oct 2026US 2026/0313182 A1The Nielsen Company (US), LLC
- Systems and methods for recommending content using progress bars24 Sep 2026US 2026/0292309 A1Adeia Guides Inc.
- Systems and Methods for Detecting Unauthorized Digital Video Stream Copying Using Unpredictable Temporal and Spatial Varying Watermark24 Sep 2026US 2026/0292312 A1Verimatrix, Inc.
- Methods and apparatus for affiliate interrupt detection17 Sep 2026US 2026/0281477 A1The Nielsen Company (US), LLC
Most cited
By later US patents
- Systems and methods for secure transaction management and electronic rights protection3,563US 5,892,900 AIntertrust Technologies Corporation · 1999
- Systems and methods for secure transaction management and electronic rights protection1,270US 5,982,891 AIntertrust Technologies Corporation · 1999
- Systems and methods for secure transaction management and electronic rights protection1,156US 5,910,987 AIntertrust Technologies Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Audience measurement system utilizing ancillary codes and passive signatures1,063US 5,481,294 AA. C. Nielsen Company · 1996