H04M 3/241
For stored program controlled exchanges
Official title: {for stored program controlled exchanges}
H04M3/241 (For stored program controlled exchanges) appears on 93 US grants and 54 published applications in this corpus.
Search patents in H04M- Granted patents
- 93
- Published applications
- 54
- Assignees
- 61
- Inventors
- 227
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 4 |
| 2003 | 3 | 4 |
| 2004 | 4 | 3 |
| 2005 | 1 | 1 |
| 2006 | 1 | 3 |
| 2007 | 4 | 6 |
| 2008 | 1 | 4 |
| 2009 | 4 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 4 | 1 |
| 2013 | 2 | 1 |
| 2014 | 3 | 2 |
| 2015 | 1 | 1 |
| 2016 | 3 | 5 |
| 2017 | 3 | 0 |
| 2018 | 3 | 1 |
| 2019 | 4 | 3 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 3 | 6 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 3 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inbound and outbound communication session and call control3 Feb 2026US 12,542,850 B2MBTE Holdings Sweden AB
- Inbound and outbound communication session and call control3 Feb 2026US 12,542,851 B2MBTE Holdings Sweden AB
- Method and apparatus for testing full-duplex speech interaction system10 Jun 2025US 12,327,545 B2Ai Speech Co., Ltd.
- User-based chaos system22 Apr 2025US 12,284,312 B2Rakuten Mobile, Inc.
- Hybrid cloud PBX11 Feb 2025US 12,225,162 B2
- Inbound and outbound communication session and call control6 Aug 2026US 2026/0230556 A1MBTE Holdings Sweden AB
- Hybrid Cloud PBX16 Oct 2025US 2025/0324000 A1
- Convolutional neural network for software log classification18 Sep 2025US 2025/0291699 A1Viavi Solutions Inc.
- Method and apparatus for testing full-duplex speech interaction system16 Mar 2023US 2023/0077478 A1Ai Speech Co., Ltd.
- A computer-implemented method of modifying an algorithm operating on a computing system1 Dec 2022US 2022/0383139 A1British Telecommunications Public Ltd.Co.
Most cited
By later US patents
- Software fault management system476US 6,012,152 ATelefonaktiebolaget LM Ericsson (publ) · 2000
- Reliable local data network arrangement263US 4,692,918 AAT&T Bell Laboratories · 1987
- Method and system for software updating206US 6,658,090 B1Nokia Corporation · 2003
- Behavior monitoring and analyzing system for stored program controlled switching system110US 5,488,648 ATelefonaktiebolaget L M Ericsson · 1996
- Metrics-related testing of an operational support system (OSS) of an incumbent provider for compliance with a regulatory scheme78US 6,636,585 B2BearingPoint, Inc. · 2003