H04M 15/34
Charging, billing or metering arrangements for private branch exchanges
Official title: {Charging, billing or} metering arrangements for private branch exchanges
H04M15/34 (Charging, billing or metering arrangements for private branch exchanges) appears on 75 US grants and 32 published applications in this corpus.
Search patents in H04M- Granted patents
- 75
- Published applications
- 32
- Assignees
- 37
- Inventors
- 90
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 4 |
| 2003 | 3 | 0 |
| 2004 | 0 | 1 |
| 2005 | 3 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 2 | 3 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 3 | 1 |
| 2019 | 2 | 2 |
| 2020 | 4 | 3 |
| 2021 | 1 | 2 |
| 2022 | 1 | 1 |
| 2023 | 3 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Identifying and processing, for priority, calls in data communications server8 Sep 2026US 12,732,579 B18x8, Inc.
- Method and system for a multitenancy telephone network13 May 2025US 12,301,766 B2Twilio Inc.
- Method and system for a multitenancy telephone network10 Oct 2023US 11,785,145 B2Twilio Inc.
- Mobile computing device having dynamically reconfigurable session initiation protocol (SIP) phone services18 Jul 2023US 11,706,351 B2Bullhead Innovations Ltd.
- Identifying and processing, for priority, calls in data communications server21 Mar 2023US 11,611,654 B18×8, Inc.
- Method and system for a multitenancy telephone network7 Dec 2023US 2023/0396713 A1Twilio Inc.
- Method and system for a multitenancy telephone network27 Jan 2022US 2022/0030114 A1Twilio Inc.
- Mobile computing device having dynamically reconfigurable session initiation protocol (sip) phone services23 Dec 2021US 2021/0400149 A1Bullhead Innovations Ltd.
- Apparatus for configuring a user device for communication with a communication server and method thereof22 Apr 2021US 2021/0120131 A1Bullhead Innovations Ltd.
- Method and system for a multitenancy telephone network30 Jul 2020US 2020/0244810 A1Twilio Inc.
Most cited
By later US patents
- Method and system for a multitenancy telephone network111US 8,315,369 B2Twilio Inc. · 2012
- Multi-location management system108US 6,854,010 B1BlueCube Software, Inc. · 2005
- Telecommunications system with active database84US 5,515,425 AAT&T Corp. · 1996
- Telephone agent management information system76US 4,988,209 AAT&T Bell Laboratories · 1991
- Inter-exchange carrier access selection feature for a PBX user75US 4,791,665 AAmerican Telephone and Telegraph Company, AT&T Information Systems · 1988