H04N 21/418
External card to be used in combination with the client device
Official title: External card to be used in combination with the client device, e.g. for conditional access
H04N21/418 (External card to be used in combination with the client device) appears on 1,701 US grants and 2,158 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,701
- Published applications
- 2,158
- Assignees
- 606
- Inventors
- 3,170
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 20 | 0 |
| 1999 | 17 | 0 |
| 2000 | 27 | 0 |
| 2001 | 23 | 25 |
| 2002 | 20 | 98 |
| 2003 | 27 | 110 |
| 2004 | 31 | 149 |
| 2005 | 36 | 180 |
| 2006 | 68 | 166 |
| 2007 | 63 | 189 |
| 2008 | 54 | 132 |
| 2009 | 99 | 128 |
| 2010 | 137 | 146 |
| 2011 | 125 | 112 |
| 2012 | 100 | 93 |
| 2013 | 131 | 121 |
| 2014 | 139 | 104 |
| 2015 | 132 | 80 |
| 2016 | 88 | 63 |
| 2017 | 73 | 46 |
| 2018 | 44 | 39 |
| 2019 | 43 | 33 |
| 2020 | 36 | 39 |
| 2021 | 32 | 24 |
| 2022 | 31 | 25 |
| 2023 | 25 | 19 |
| 2024 | 20 | 17 |
| 2025 | 22 | 15 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for intelligently managing storage space occupied by media assets25 Aug 2026US 12,720,150 B2Adeia Guides Inc.
- Secure management of accounts on display devices using a contactless card5 May 2026US 12,621,155 B2Capital One Services, LLC
- Smart card interface, data transmission method and television chip21 Apr 2026US 12,610,102 B2Beijing ESWIN Computing Technology Co., Ltd.
- Content protection10 Feb 2026US 12,549,786 B2Nagravision Sarl
- Magnetic connector attachment and heat sinking23 Dec 2025US 12,506,922 B2DISH Network L.L.C.
- Server device, display device, and program23 Jul 2026US 2026/0214287 A1Radius Inc.
- Audio video receiver (avr) architecture23 Jul 2026US 2026/0214295 A1Lenbrook Industries Limited
- Interactive video input/output system and its wireless projection transmitter2 Jul 2026US 2026/0189680 A1Nimbletech Digital Inc.
- Content protection4 Jun 2026US 2026/0156307 A1Nagravision Sarl
- Magnetic connector attachment and heat sinking30 Apr 2026US 2026/0122306 A1DISH Network L.L.C.
Most cited
By later US patents
- Multi-room entertainment system with in-room media player/dispenser1,755US 6,256,554 B12001
- Television program delivery system971US 5,559,549 ADiscovery Communications, Inc. · 1996
- Signal processing appparatus and methods797US 5,335,277 AThe Personalized Mass Media Corporation · 1994
- System and method for secure purchase and delivery of video content programs716US 6,055,314 AMicrosoft Corporation · 2000
- Advanced set top terminal for cable television delivery systems699US 5,990,927 ADiscovery Communications, Inc. · 1999