H04M 2215/42
Least cost routing, i.e. provision for selecting the lowest cost tariff
H04M2215/42 (Least cost routing, i.e. provision for selecting the lowest cost tariff) appears on 351 US grants and 246 published applications in this corpus.
Search patents in H04M- Granted patents
- 351
- Published applications
- 246
- Assignees
- 174
- Inventors
- 663
- Latest grant
- 3 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 19 | 0 |
| 2000 | 23 | 0 |
| 2001 | 32 | 13 |
| 2002 | 26 | 35 |
| 2003 | 32 | 21 |
| 2004 | 19 | 24 |
| 2005 | 23 | 45 |
| 2006 | 15 | 25 |
| 2007 | 14 | 21 |
| 2008 | 11 | 12 |
| 2009 | 14 | 6 |
| 2010 | 17 | 6 |
| 2011 | 16 | 10 |
| 2012 | 12 | 6 |
| 2013 | 11 | 8 |
| 2014 | 6 | 1 |
| 2015 | 6 | 1 |
| 2016 | 3 | 1 |
| 2017 | 3 | 4 |
| 2018 | 4 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
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- Systems and methods for tagging fraudulent phone numbers27 Apr 2023US 2023/0128054 A1Somos, Inc.
- Toll-free telecommunications and data management platform4 Feb 2021US 2021/0037142 A1Somos, Inc.
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Most cited
By later US patents
- System for automatically updating personal profile server with updates to additional user information gathered from monitoring user's electronic consuming habits generated on computer during use968US 5,710,884 AIntel Corporation · 1998
- System for selective communication connection based on transaction pricing signals599US 5,802,502 ABritish Telecommunications Public Ltd.Co. · 1998
- okApparatus for a voice over IP (voIP) telephony gateway and methods for use therein511US 6,363,065 B1Quintum Technologies, Inc. · 2002
- Integrated customer interface for web based data management455US 6,615,258 B1WorldCom, Inc. · 2003
- Method for billing IP broadband subscribers422US 6,775,267 B1AT&T Corp. · 2004