H04M 3/52
Arrangements for routing dead number calls to operators
H04M3/52 (Arrangements for routing dead number calls to operators) appears on 22 US grants and 14 published applications in this corpus.
Search patents in H04M- Granted patents
- 22
- Published applications
- 14
- Assignees
- 19
- Inventors
- 38
- Latest grant
- 2 May 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 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 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 1 | 0 |
| 2003 | 1 | 3 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 4 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Tracing and asynchronous communication network and routing method2 May 2017US 9,641,684 B1Verint Americas Inc.
- Avoiding failed routes3 Mar 2015US 8,971,514 B2Verizon Patent and Licensing Inc.
- Method and system for providing directory assistance to erroneous telephone calls via wearable devices16 Dec 2014US 8,913,732 B2
- Method and system for providing directory assistance to erroneous telephone calls8 Apr 2014US 8,693,664 B2
- Method and system for providing directory assistance to erroneous telephone calls25 Jun 2013US 8,472,607 B2
- Tracing and asynchronous communication network and routing method13 Apr 2017US 2017/0104876 A1Contact Solutions LLC
- Method and system for providing directory assistance to erroneous telephone calls via wearable devices7 Aug 2014US 2014/0220945 A1
- Avoiding failed routes29 Aug 2013US 2013/0223605 A1Verizon Patent and Licensing Inc.
- Method and system for providing directory assistance to erroneous telephone calls7 Feb 2013US 2013/0034217 A1
- Method and system for providing directory assistance to erroneous telephone calls7 Feb 2013US 2013/0034224 A1
Most cited
By later US patents
- Method of and system for providing network-initiated multilingual operator assistance70US 6,205,215 B1MCI Communications Corporation · 2001
- Transfer-connect telephony services utilizing automated audio systems53US 6,320,951 B1Genesys Telecommunications Laboratories, Inc. · 2001
- Transfer-connect telephony services utilizing automated audio systems47US 6,072,864 AGenesys Telecommunication Laboratories, Inc. · 2000
- System and method for storing, routing, and tracking digital documents in a call center46US 6,597,783 B1Cisco Systems, Inc. · 2003
- Directory assistance access to intercept telephone numbers40US 5,892,820 ABell Atlantic Network Services, Inc. · 1999