H04N 9/87
Regeneration of colour television signals
Official title: Regeneration of colour television signals (H04N9/80 takes precedence)
H04N9/87 (Regeneration of colour television signals) appears on 2,550 US grants and 1,802 published applications in this corpus.
Search patents in H04N- Granted patents
- 2,550
- Published applications
- 1,802
- Assignees
- 453
- Inventors
- 2,958
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 23 | 0 |
| 1978 | 19 | 0 |
| 1979 | 10 | 0 |
| 1980 | 18 | 0 |
| 1981 | 24 | 0 |
| 1982 | 24 | 0 |
| 1983 | 24 | 0 |
| 1984 | 24 | 0 |
| 1985 | 26 | 0 |
| 1986 | 27 | 0 |
| 1987 | 46 | 0 |
| 1988 | 44 | 0 |
| 1989 | 44 | 0 |
| 1990 | 30 | 0 |
| 1991 | 36 | 0 |
| 1992 | 59 | 0 |
| 1993 | 41 | 0 |
| 1994 | 44 | 0 |
| 1995 | 46 | 0 |
| 1996 | 77 | 0 |
| 1997 | 52 | 0 |
| 1998 | 84 | 0 |
| 1999 | 55 | 0 |
| 2000 | 56 | 0 |
| 2001 | 36 | 18 |
| 2002 | 33 | 73 |
| 2003 | 41 | 23 |
| 2004 | 32 | 26 |
| 2005 | 23 | 48 |
| 2006 | 21 | 74 |
| 2007 | 18 | 83 |
| 2008 | 29 | 93 |
| 2009 | 50 | 65 |
| 2010 | 56 | 67 |
| 2011 | 187 | 216 |
| 2012 | 75 | 46 |
| 2013 | 104 | 168 |
| 2014 | 115 | 189 |
| 2015 | 125 | 92 |
| 2016 | 115 | 93 |
| 2017 | 97 | 91 |
| 2018 | 90 | 83 |
| 2019 | 77 | 62 |
| 2020 | 73 | 69 |
| 2021 | 69 | 47 |
| 2022 | 50 | 32 |
| 2023 | 36 | 21 |
| 2024 | 24 | 14 |
| 2025 | 9 | 5 |
| 2026 | 11 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04N 9/88Signal drop-out compensation513
- H04N 9/877By assembling picture element blocks in an intermediate memory381
- H04N 9/8715Involving the mixing of the reproduced video signal with a non-recorded signal376
- H04N 9/89Time-base error compensation303
- H04N 9/873For restoring the colour component sequence of the reproduced chrominance signal49
- H04N 9/8722Regeneration of a colour reference signal37
- H04N 9/898Using frequency multiplication of the reproduced colour signal carrier with another auxiliary35
- H04N 9/8707Using a demodulator and a remodulator33
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Most cited
By later US patents
- Program information broadcasting method program information display method, and receiving device531US 5,686,954 ASony Corporation · 1997
- Digital video recorder compatible receiver with trick play image enhancement527US 5,377,051 AHitachi America, Ltd. · 1994
- System and method for compiling and playing a multi-channel video425US 9,258,459 B2Radical Switchcam LLC · 2016
- System and method for compiling and playing a multi-channel video411US 9,344,606 B2Radical Switchcam LLC · 2016
- Encoding/decoding moving images with forward and backward keyframes for forward and reverse display409US 5,267,334 AApple Computer, Inc. · 1993