H04Q 3/625
Arrangements in the private branch exchange
Official title: {Arrangements in the private branch exchange}
H04Q3/625 (Arrangements in the private branch exchange) appears on 379 US grants and 53 published applications in this corpus.
Search patents in H04Q- Granted patents
- 379
- Published applications
- 53
- Assignees
- 155
- Inventors
- 618
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 14 | 0 |
| 1990 | 19 | 0 |
| 1991 | 12 | 0 |
| 1992 | 8 | 0 |
| 1993 | 10 | 0 |
| 1994 | 22 | 0 |
| 1995 | 25 | 0 |
| 1996 | 24 | 0 |
| 1997 | 20 | 0 |
| 1998 | 30 | 0 |
| 1999 | 28 | 0 |
| 2000 | 22 | 0 |
| 2001 | 14 | 12 |
| 2002 | 17 | 16 |
| 2003 | 9 | 5 |
| 2004 | 10 | 3 |
| 2005 | 5 | 1 |
| 2006 | 5 | 2 |
| 2007 | 7 | 5 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 2 | 0 |
| 2011 | 3 | 2 |
| 2012 | 1 | 1 |
| 2013 | 5 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Web-server to host switchboard interfaces13 May 2025US 12,301,764 B18x8, Inc.
- Nurse call system29 Nov 2022US 11,515,034 B2Aiphone Co., Ltd.
- IPBX control interface for distributed networks28 Jun 2022US 11,375,064 B18x8, Inc.
- IPBX control interface for distributed networks14 Jul 2020US 10,715,673 B18x8, Inc.
- Exchange, call facilitation method, and call facilitation program2 Jun 2020US 10,674,013 B2NEC Platforms, Ltd.
- System and Method for Dynamically Routing Call Data Between Client Devices and Public Branch Exchange Systems5 Feb 2026US 2026/0039980 A1Zebra Technologies Corporation
- Nurse call system13 Aug 2020US 2020/0258619 A1Aiphone Co., Ltd.
- Exchange, call facilitation method, and call facilitation program28 Mar 2019US 2019/0098131 A1NEC Platforms, Ltd.
- Bulk telephony control system subscriber data manipulation13 Apr 2017US 2017/0105056 A1Broadsource Group Pty Ltd
- Private branch exchange, voice quality adjustment method, and non-transitory computer-readable medium storing voice quality adjusting program4 Jul 2013US 2013/0170636 A1NEC Infrontia Corporation
Most cited
By later US patents
- Method and apparatus for locating personnel and objects in response to telephone inquiries424US 5,548,637 APrecision Tracking FM, Inc. · 1996
- Network based distributed PBX system407US 5,742,596 APhonet Communication Ltd. · 1998
- Network server platform for internet, JAVA server and video application server365US 6,044,403 AAT&T Corp. · 2000
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- System and method for providing a remote user with a virtual presence to an office324US 5,889,845 AData Race, Inc. · 1999