H04N 21/63345
By transmitting keys
Official title: {by transmitting keys (key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06)}
H04N21/63345 (By transmitting keys) appears on 781 US grants and 984 published applications in this corpus.
Search patents in H04N- Granted patents
- 781
- Published applications
- 984
- Assignees
- 320
- Inventors
- 1,549
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 11 | 10 |
| 2002 | 9 | 55 |
| 2003 | 7 | 36 |
| 2004 | 19 | 73 |
| 2005 | 17 | 51 |
| 2006 | 30 | 82 |
| 2007 | 29 | 72 |
| 2008 | 35 | 44 |
| 2009 | 25 | 63 |
| 2010 | 29 | 54 |
| 2011 | 41 | 42 |
| 2012 | 51 | 55 |
| 2013 | 63 | 33 |
| 2014 | 62 | 39 |
| 2015 | 57 | 32 |
| 2016 | 38 | 43 |
| 2017 | 38 | 23 |
| 2018 | 30 | 31 |
| 2019 | 26 | 27 |
| 2020 | 19 | 23 |
| 2021 | 26 | 18 |
| 2022 | 25 | 20 |
| 2023 | 21 | 20 |
| 2024 | 21 | 16 |
| 2025 | 9 | 11 |
| 2026 | 9 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and device for distributing a multicast encryption key18 Aug 2026US 12,712,712 B2Koninklijke Philips N. V.
- Validating parameters on discrete computing applications to grant access control to content or commands16 Jun 2026US 12,659,552 B2Touchstream Technologies, Inc.
- Secure content delivery to multiple client devices via a local server2 Jun 2026US 12,647,632 B2AT&T Intellectual Property I, L. P.
- Systems and methods for quick start-up of playback26 May 2026US 12,641,142 B2Divx, LLC
- System and method for converting adaptive stream to downloadable media21 Apr 2026US 12,610,092 B2Resi Media LLC
- Validating parameters on discrete computing applications to grant access control to content or commands24 Sep 2026US 2026/0292311 A1Touchstream Technologies, Inc.
- Method for providing authenticated digital content13 Aug 2026US 2026/0238492 A1Nagravision Sarl
- Conditional access system based audience measurement13 Aug 2026US 2026/0238851 A1Nagravision Sarl
- System and method for transcoding media stream6 Aug 2026US 2026/0230658 A1Resi Media LLC
- System and method for converting adaptive stream to downloadable media30 Jul 2026US 2026/0222631 A1Resi Media LLC
Most cited
By later US patents
- System and method for secure purchase and delivery of video content programs716US 6,055,314 AMicrosoft Corporation · 2000
- ATM packet demultiplexer for use in full service network having distributed architecture371US 5,544,161 ABell Atlantic Network Services, Inc. · 1996
- Network providing signals of different formats to a user by multplexing compressed broadband data with data of a different format into MPEG encoded data stream371US 5,666,487 ABell Atlantic Network Services, Inc. · 1997
- Location-sensitive remote database access control338US 5,243,652 AGTE Laboratories Incorporated · 1993
- Verification of the source of program information in a conditional access system260US 6,105,134 AScientific-Atlanta, Inc. · 2000