H04B 3/12
In negative-feedback path of line amplifier
Official title: in negative-feedback path of line amplifier
H04B3/12 (In negative-feedback path of line amplifier) appears on 3 US grants and 2 published applications in this corpus.
Search patents in H04B- Granted patents
- 3
- Published applications
- 2
- Assignees
- 4
- Inventors
- 6
- Latest grant
- 28 Jan 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Receiving device and receiving method28 Jan 2014US 8,638,843 B2Fujitsu Limited
- Line interface with analog echo cancellation1 May 2007US 7,212,627 B2Analog Devices, Inc.
- Broad band amplifier having negative feedback and a controllable amplification factor10 May 1977US 4,023,112 ATelefonaktiebolaget L M Ericsson
Most cited
By later US patents
- Broad band amplifier having negative feedback and a controllable amplification factor6US 4,023,112 ATelefonaktiebolaget L M Ericsson · 1977
- Line interface with analog echo cancellation5US 7,212,627 B2Analog Devices, Inc. · 2007
- Receiving device and receiving method1US 8,638,843 B2Fujitsu Limited · 2014