H03F 3/3077
Using darlington transistors
Official title: {using Darlington transistors (H03F3/3079 takes precedence)}
H03F3/3077 (Using darlington transistors) appears on 33 US grants and 1 published applications in this corpus.
Search patents in H03F- Granted patents
- 33
- Published applications
- 1
- Assignees
- 23
- Inventors
- 38
- Latest grant
- 26 Jan 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 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 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Amplification circuit26 Jan 2016US 9,246,448 B2Sony Corporation
- Current-boosting output stage with short-circuit protection28 Jul 2015US 9,093,992 B1Maxim Integrated Products, Inc.
- High efficiency power amplifier22 May 2001US 6,236,273 B1Pairgain Technologies, Inc.
- Semiconductor device having SEPP connected NPN and PNP transistors25 Apr 2000US 6,054,898 AKabushiki Kaisha Kenwood
- Low offset push-pull amplifier5 Oct 1999US 5,963,065 AConsorzio per la Ricerca sulla Microelettronica nel Mezzogiorno
Most cited
By later US patents
- Audio amplifier65US 4,797,633 AVideo Sound, Inc. · 1989
- Audio amplifier33US 4,638,260 A1987
- High efficiency power amplifier20US 6,236,273 B1Pairgain Technologies, Inc. · 2001
- Low distortion amplifier13US 5,768,399 AAudio-Technica U.S., Inc. · 1998
- Linear amplifier with transient current boost12US 4,833,424 AElantec, Inc. · 1989