H04N 21/4135
External recorder
Official title: {external recorder (interface circuits between an apparatus for recording television signals and a television receiver H04N5/775)}
H04N21/4135 (External recorder) appears on 1,090 US grants and 1,236 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,090
- Published applications
- 1,236
- Assignees
- 310
- Inventors
- 1,862
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 12 | 0 |
| 1998 | 27 | 0 |
| 1999 | 29 | 0 |
| 2000 | 30 | 0 |
| 2001 | 29 | 26 |
| 2002 | 21 | 61 |
| 2003 | 17 | 66 |
| 2004 | 29 | 77 |
| 2005 | 25 | 114 |
| 2006 | 36 | 91 |
| 2007 | 36 | 85 |
| 2008 | 30 | 103 |
| 2009 | 38 | 84 |
| 2010 | 65 | 96 |
| 2011 | 80 | 57 |
| 2012 | 85 | 53 |
| 2013 | 72 | 40 |
| 2014 | 99 | 46 |
| 2015 | 63 | 55 |
| 2016 | 51 | 43 |
| 2017 | 41 | 24 |
| 2018 | 35 | 23 |
| 2019 | 25 | 20 |
| 2020 | 24 | 21 |
| 2021 | 19 | 12 |
| 2022 | 11 | 18 |
| 2023 | 14 | 5 |
| 2024 | 13 | 11 |
| 2025 | 9 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Realtime wireless synchronization of live event audio stream with a video recording16 Jun 2026US 12,660,290 B2Bygge Technologies Inc.
- Quick save method for recording surgical videos2 Dec 2025US 12,488,811 B2Leica Instruments (Singapore) Pte. Ltd.
- Real-time DVR programming4 Nov 2025US 12,464,193 B2Adeia Media Solutions Inc.
- Apparatus and methods for storing, accessing, and delivering data21 Oct 2025US 12,452,475 B2Time Warner Cable Enterprises LLC
- Information processing terminal, information processing method, and program26 Aug 2025US 12,401,855 B2Saturn Licensing LLC
- Realtime wireless synchronization of live event audio stream with a video recording8 Oct 2026US 2026/0314022 A1Bygge Technologies Inc.
- Information processing system, information processing system control method, and non-transitory storage medium storing13 Aug 2026US 2026/0237030 A1Pioneer Corporation
- Information processing terminal, information processing method, and program22 Jan 2026US 2026/0025554 A1Saturn Licensing LLC
- Recording System and Methods of Using Same17 Jul 2025US 2025/0234057 A1
- Swivel search system22 May 2025US 2025/0168462 A1Adeia Media Solutions Inc.
Most cited
By later US patents
- System and method for providing content, management, and interactivity for client devices1,890US 7,130,616 B2Simple Devices · 2006
- Multi-room entertainment system with in-room media player/dispenser1,755US 6,256,554 B12001
- Television schedule system1,133US 5,353,121 AStarsight Telecast, Inc. · 1994
- System and process for VCR scheduling1,066US 4,977,455 AInsight Telecast, Inc. · 1990
- User interface for television schedule system1,011US 5,479,268 AStarsight Telecast, Inc. · 1995