H04M 19/003
Arrangements for compensation of the dc flux in line transformers
Official title: {Arrangements for compensation of the DC flux in line transformers}
H04M19/003 (Arrangements for compensation of the dc flux in line transformers) appears on 31 US grants and 3 published applications in this corpus.
Search patents in H04M- Granted patents
- 31
- Published applications
- 3
- Assignees
- 17
- Inventors
- 41
- Latest grant
- 10 Apr 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 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 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Circuit arrangement for reducing a unidirectional flux component in the soft-magnetic core of a transformer10 Apr 2018US 9,941,046 B2Siemens Aktiengesellschaft
- Load balancing reverse power supply19 Apr 2016US 9,319,537 B2Microsemi Corporation
- Trunk interface circuit having function of battery feed to central office7 Nov 2000US 6,144,737 AMatsushita Electric Industrial Co., Ltd.
- Flux cancelling transformer line circuit1 Feb 2000US 6,020,732 AModern Systems Research, Inc.
- DC application circuit with suppressed DC magnetization18 Aug 1998US 5,796,279 ATokyo Tsuki Co., Ltd.
- Circuit Arrangement for Reducing a Unidirectional Flux Component in the Soft-Magnetic Core of a Transformer27 Jul 2017US 2017/0213641 A1Siemens Aktiengesellschaft
- Load balancing reverse power supply22 Oct 2015US 2015/0304508 A1Microsemi Corporation
- Line interface for combining a voice band signal and an XDSL signal on a twisted-pair copper line24 Jul 2003US 2003/0138082 A1
Most cited
By later US patents
- Trunk interface circuit having function of battery feed to central office22US 6,144,737 AMatsushita Electric Industrial Co., Ltd. · 2000
- Transmission network including flux compensation21US 4,096,363 ABell Telephone Laboratories, Incorporated · 1978
- Telephone line interface circuit21US 4,864,609 ANorthern Telecom Limited · 1989
- Subscriber line interface circuit providing regulated current20US 5,138,658 ASeiscor Technologies, Inc. · 1992
- Telephone line circuit with differential loop current sensing and compensation18US 4,103,112 ANorthern Telecom Limited · 1978