H04M 3/248
For metering arrangements or prepayment telephone systems
Official title: {for metering arrangements or prepayment telephone systems (metering arrangements per se H04M15/00; prepayment telephone systems per se H04M17/00)}
H04M3/248 (For metering arrangements or prepayment telephone systems) appears on 33 US grants and 9 published applications in this corpus.
Search patents in H04M- Granted patents
- 33
- Published applications
- 9
- Assignees
- 26
- Inventors
- 61
- Latest grant
- 11 Oct 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Testing toll-free data service campaigns11 Oct 2016US 9,467,339 B2Verizon Patent and Licensing Inc.
- System and method for individual sequential campaign7 Apr 2015US 9,002,731 B2Papatel, Inc.
- Method and testing device for verifying the charge invoicing for a communications connection according to time-unit intervals5 Apr 2011US 7,920,683 B2Deutsche Telekom AG
- System and method for monitoring time-related connection data detected by a network node27 Nov 2007US 7,302,045 B2Deutsche Telekom AG
- System, evaluation device and method for verifying connection-related communication data determined by a digital exchange16 Jan 2007US 7,164,758 B1Deutsche Telekom AG
- Testing toll-free data service campaigns25 Feb 2016US 2016/0057013 A1Verizon Patent and Licensing Inc.
- System and Method for Individual Sequential Campaign30 Aug 2012US 2012/0221416 A1Sumo Technologies, LLC
- Method For Securing The Communication Links And The Associated Charges In A Redundant Communication Network5 Jun 2008US 2008/0130487 A1Siemens Aktiengesellschaft
- System and method for verifying subscriber data records in a telephone system5 Jul 2007US 2007/0155383 A1BellSouth Intellectual Property Corporation
- System and method for monitoring time-related connection data detected by a network node25 May 2006US 2006/0109962 A1Deutsche Telekom AG
Most cited
By later US patents
- Method and apparatus for providing user controlled call management services292US 5,548,636 ANorthern Telecom Limited · 1996
- Method and apparatus for providing user controlled call management services88US 5,668,862 ANorthern Telecom Limited · 1997
- Coin telephone measurement circuitry68US 4,590,583 AAT&T Bell Laboratories · 1986
- Pay telephone station monitor system60US 4,039,768 A1977
- Method of scheduling connections50US 6,516,052 B2British Telecommunications Public Ltd.Co. · 2003