H04N 21/23473
By pre-encrypting
Official title: {by pre-encrypting}
H04N21/23473 (By pre-encrypting) appears on 86 US grants and 140 published applications in this corpus.
Search patents in H04N- Granted patents
- 86
- Published applications
- 140
- Assignees
- 54
- Inventors
- 186
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 4 |
| 2002 | 1 | 9 |
| 2003 | 0 | 25 |
| 2004 | 1 | 12 |
| 2005 | 1 | 12 |
| 2006 | 6 | 12 |
| 2007 | 4 | 6 |
| 2008 | 7 | 14 |
| 2009 | 5 | 10 |
| 2010 | 7 | 5 |
| 2011 | 6 | 5 |
| 2012 | 8 | 3 |
| 2013 | 8 | 4 |
| 2014 | 7 | 3 |
| 2015 | 4 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 4 |
| 2021 | 3 | 3 |
| 2022 | 3 | 1 |
| 2023 | 3 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Secure content delivery to multiple client devices via a local server2 Jun 2026US 12,647,632 B2AT&T Intellectual Property I, L. P.
- System, method, and apparatus for generating tokenized images23 Sep 2025US 12,423,872 B2Visa International Service Association
- Secure content delivery to multiple client devices via a local server29 Oct 2024US 12,132,948 B2AT&T Intellectual Property I, L. P.
- System, method, and apparatus for generating tokenized images18 Jun 2024US 12,014,526 B2Visa International Service Association
- Streaming with low latency encryption ready packaging10 Oct 2023US 11,784,787 B2Synamedia Limited
- Secure content delivery to multiple client devices via a local server26 Dec 2024US 2024/0430507 A1AT&T Intellectual Property I, L. P.
- System, Method, and Apparatus for Generating Tokenized Images15 Aug 2024US 2024/0273768 A1Visa International Service Association
- Streaming with Low Latency Encryption Ready Packaging3 Aug 2023US 2023/0246808 A1Synamedia Vividtec Holdings, Inc.
- Secure content delivery to multiple client devices via a local server23 Mar 2023US 2023/0088143 A1AT&T Intellectual Property I, L. P.
- Methods and system for serving targeted advertisements to a consumer device27 Jan 2022US 2022/0027945 A1Mad Technologies Foundation Ltd.
Most cited
By later US patents
- Audio and video transmission and receiving system533US 5,253,275 A1993
- Audio and video transmission and receiving system450US 5,550,863 A1996
- Selective and renewable encryption for secure distribution of video on-demand398US 6,415,031 B1DIVA Systems Corporation · 2002
- Secure distribution of video on-demand304US 6,681,326 B2DIVA Systems Corporation · 2004
- System, method, and apparatus for securely providing content viewable on a secure device221US 7,007,170 B2Widevine Technologies, Inc. · 2006