H04Q 3/58
Arrangements providing connection between main exchange and sub-exchange or satellite
H04Q3/58 (Arrangements providing connection between main exchange and sub-exchange or satellite) appears on 887 US grants and 328 published applications in this corpus.
Search patents in H04Q- Granted patents
- 887
- Published applications
- 328
- Assignees
- 318
- Inventors
- 1,430
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 10 | 0 |
| 1988 | 15 | 0 |
| 1989 | 21 | 0 |
| 1990 | 25 | 0 |
| 1991 | 16 | 0 |
| 1992 | 11 | 0 |
| 1993 | 17 | 0 |
| 1994 | 31 | 0 |
| 1995 | 43 | 0 |
| 1996 | 39 | 0 |
| 1997 | 31 | 0 |
| 1998 | 53 | 0 |
| 1999 | 58 | 0 |
| 2000 | 45 | 0 |
| 2001 | 41 | 22 |
| 2002 | 45 | 40 |
| 2003 | 42 | 28 |
| 2004 | 42 | 38 |
| 2005 | 25 | 29 |
| 2006 | 22 | 20 |
| 2007 | 18 | 24 |
| 2008 | 11 | 15 |
| 2009 | 15 | 5 |
| 2010 | 17 | 7 |
| 2011 | 19 | 14 |
| 2012 | 21 | 14 |
| 2013 | 26 | 15 |
| 2014 | 14 | 1 |
| 2015 | 8 | 10 |
| 2016 | 6 | 7 |
| 2017 | 9 | 6 |
| 2018 | 9 | 8 |
| 2019 | 7 | 5 |
| 2020 | 7 | 5 |
| 2021 | 3 | 3 |
| 2022 | 5 | 4 |
| 2023 | 2 | 2 |
| 2024 | 3 | 3 |
| 2025 | 4 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Exchange, and telephone exchange method25 Aug 2026US 12,719,983 B2NEC Platforms, Ltd.
- Private branch exchange high availability server18 Aug 2026US 12,712,966 B1Zoom Communications, Inc.
- Communication management device, communication management method, communication management program, and communication management system30 Dec 2025US 12,513,247 B2Itall Inc.
- Calling line/name identification of enterprise subscribers in mobile calls23 Sep 2025US 12,425,814 B2Tango Networks, Inc.
- Web-server to host switchboard interfaces13 May 2025US 12,301,764 B18x8, Inc.
- Multi-version communication system9 Apr 2026US 2026/0101129 A1G.S. Consulting & Research Correnet Ltd
- System and Method for Dynamically Routing Call Data Between Client Devices and Public Branch Exchange Systems5 Feb 2026US 2026/0039980 A1Zebra Technologies Corporation
- Gateway apparatus, private branch exchange system, and private branch exchange method2 Oct 2025US 2025/0310437 A1NEC Platforms, Ltd.
- Exchange, and telephone exchange method4 Jul 2024US 2024/0223703 A1NEC Platforms, Ltd.
- Multi-die non-blocking crossbar switch20 Jun 2024US 2024/0205570 A1Xilinx, Inc.
Most cited
By later US patents
- Apparatus and methods in routing internet protocol network telephony calls in a centrally-managed call center system435US 6,373,836 B1Genesys Telecommunications Laboratories, Inc. · 2002
- Method and apparatus for locating personnel and objects in response to telephone inquiries424US 5,548,637 APrecision Tracking FM, Inc. · 1996
- Area wide centrex423US 5,247,571 ABell Atlantic Network Services, Inc. · 1993
- 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