H04N 9/7933
The level control being frequency-dependent
Official title: {the level control being frequency-dependent}
H04N9/7933 (The level control being frequency-dependent) appears on 43 US grants and 4 published applications in this corpus.
Search patents in H04N- Granted patents
- 43
- Published applications
- 4
- Assignees
- 19
- Inventors
- 72
- Latest grant
- 13 Feb 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- System and method for processing a video signal with reduced latency13 Feb 2018US 9,891,438 B2Freedom Scientific, Inc.
- Projector having blue light alleviating part2 Jun 2015US 9,046,752 B2Mitsubishi Electric Corporation
- Projector having blue light alleviating part26 May 2015US 9,039,199 B2Mitsubishi Electric Corporation
- Recording and reproduction of video signal8 Dec 1998US 5,848,221 AVictor Company of Japan, Ltd.
- Video signal emphasis and deemphasis method and apparatus23 Jun 1998US 5,771,333 AVictor Company of Japan, Ltd.
- Video reproduction apparatus, video reproduction method and video display apparatus3 Mar 2016US 2016/0065927 A1Kabushiki Kaisha Toshiba
- System and Method for Processing a Video Signal With Reduced Latency5 Nov 2015US 2015/0316774 A1Freedom Scientific, Inc.
- Projector31 Oct 2013US 2013/0286052 A1Mitsubishi Electric Corporation
- Projector10 Oct 2013US 2013/0265498 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Gain correction system for videodisc player apparatus55US 4,370,679 ADiscovision Associates · 1983
- Dual deck videocassette recorder system29US 5,124,807 AGo-Video, Inc. · 1992
- Recording and reproducing apparatus for a video tape recorder25US 4,613,912 AHitachi, Ltd. · 1986
- Dual deck videocassette recorder system23US 5,194,963 AGo-Video, Inc. · 1993
- Non-linear digital emphasis circuit21US 4,668,988 ASony Corporation · 1987