H04Q 3/622
Circuit arrangements therefor
Official title: {Circuit arrangements therefor}
H04Q3/622 (Circuit arrangements therefor) appears on 54 US grants and 3 published applications in this corpus.
Search patents in H04Q- Granted patents
- 54
- Published applications
- 3
- Assignees
- 25
- Inventors
- 70
- Latest grant
- 25 Aug 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 10 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 0 |
| 2003 | 2 | 3 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Internet protocol compliant private branch electronic exchange and a method expanding the number of controlled terminal ports25 Aug 2009US 7,580,402 B2NEC Infrontia Corporation
- Routing in a private network with compression21 Jun 2005US 6,909,694 B1Alcatel
- Routing calls with overflows in a private network2 Nov 2004US 6,813,246 B1Alcatel
- Scaleable network server for low cost PBX27 Apr 2004US 6,728,239 B1AT&T Corp.
- Routing calls to external networks from a private network23 Dec 2003US 6,667,958 B2Alcatel
- Routing calls to external networks from a private network6 Nov 2003US 2003/0206526 A1Alcatel
- Internet Protocol compliant private branch electronic exchange and a method expanding the number of controlled terminal ports30 Oct 2003US 2003/0202648 A1NEC Corporation
- Control of access to the call completion on busy link service in a private telecommunication network16 Jan 2003US 2003/0012357 A1Alcatel
Most cited
By later US patents
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- Mobile telecommunications network having integrated wireless office system236US 5,890,064 ATelefonaktiebolaget'l M Ericsson (Publ) · 1999
- Calling center employing unified control system201US 5,479,487 AInterVoice Limited Partnership · 1995
- Enhanced call waiting161US 5,825,867 AAspect Telecommunications Corporation · 1998
- Telephone system with scheduled handling of calls149US 5,610,970 AAccessLine Technologies, Inc. · 1997