H04N 3/185
Maintaining dc voltage constant
Official title: Maintaining DC voltage constant
H04N3/185 (Maintaining dc voltage constant) appears on 216 US grants and 14 published applications in this corpus.
Search patents in H04N- Granted patents
- 216
- Published applications
- 14
- Assignees
- 70
- Inventors
- 243
- Latest grant
- 15 Sep 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 13 | 0 |
| 1981 | 9 | 0 |
| 1982 | 9 | 0 |
| 1983 | 10 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 15 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 9 | 0 |
| 1998 | 3 | 0 |
| 1999 | 12 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 8 | 4 |
| 2003 | 1 | 5 |
| 2004 | 2 | 2 |
| 2005 | 1 | 2 |
| 2006 | 3 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Reference voltage control in a power supply15 Sep 2020US 10,775,817 B2Infineon Technologies Austria AG
- Display apparatus6 Mar 2007US 7,187,371 B2Samsung Electronics Co., Ltd.
- Circuit for stabilizing high tension voltage of CRT, and method thereof6 Mar 2007US 7,187,414 B2Samsung Electronics Co., Ltd.
- High voltage deflection circuit29 Aug 2006US 7,098,613 B2Matsushita Electric Industrial Co., Ltd.
- Bus operation with integrated circuits in an unpowered state28 Feb 2006US 7,006,161 B2Thomson Licensing
- Reference voltage control in a power supply5 Sep 2019US 2019/0271998 A1Infineon Technologies Austria AG
- Control circuit and method for controlling an electrical signal over a load such as a deflection cicruit of a cathode ray tube13 Oct 2005US 2005/0225267 A1Koninklijke Philipj Electronics N.V.
- CRT display apparatus and control method thereof6 Jan 2005US 2005/0001553 A1Samsung Electronics Co., Ltd.
- Voltage stabilizing circuit for video display appliance24 Jun 2004US 2004/0119426 A1
- High voltage supply for a picture tube22 Apr 2004US 2004/0075403 A1Thomson Licensing
Most cited
By later US patents
- Method of and apparatus for efficient high voltage generation by resonant fly back49US 4,616,300 AKeltron Corporation · 1986
- Regulated power supply circuit45US 4,524,411 ARCA Corporation · 1985
- High voltage regulator for an integrated horizontal sweep system33US 5,276,604 AZenith Electronics Corporation · 1994
- Switching regulator power supply device combined with the horizontal deflection circuit of a television receiver which it supplies29US 4,368,409 AThomson-Brandt · 1983
- Control of the output power of a DC-DC converter upon varying the switching frequency26US 6,011,706 ASGS-Thomson Microelectronics S.A. · 2000