H04M 19/06
In which current supply sources at subordinate switching centres are charged from
Official title: in which current supply sources at subordinate switching centres are charged from the main exchange
H04M19/06 (In which current supply sources at subordinate switching centres are charged from) appears on 7 US grants and 1 published applications in this corpus.
Search patents in H04M- Granted patents
- 7
- Published applications
- 1
- Assignees
- 6
- Inventors
- 10
- Latest grant
- 8 Jun 2010
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 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 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Remote terminal unit connector8 Jun 2010US 7,734,037 B1Verizon Services Corp.
- Modular housing system for outside plant telecommunications equipment8 Jun 2010US 7,734,040 B1Adtran, Inc.
- Telephone terminal device20 Oct 1992US 5,157,711 AKabushiki Kaisha Toshiba
- Power transmission arrangement for telecommunications systems4 Aug 1987US 4,685,129 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories
- Power supply control circuit for subscriber carrier telephone system15 Feb 1983US 4,374,303 AGTE Automatic Electric Laboratories Incorporated
Most cited
By later US patents
- Telephone terminal device47US 5,157,711 AKabushiki Kaisha Toshiba · 1992
- Power transmission arrangement for telecommunications systems27US 4,685,129 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories · 1987
- Telephone ringing control circuits8US 4,025,729 ABell Telephone Laboratories, Incorporated · 1977
- Modular housing system for outside plant telecommunications equipment5US 7,734,040 B1Adtran, Inc. · 2010
- Power supply control circuit for subscriber carrier telephone system4US 4,145,572 AGTE Automatic Electric Laboratories Incorporated · 1979