H04M 3/244
For multiplex systems
Official title: {for multiplex systems}
H04M3/244 (For multiplex systems) appears on 182 US grants and 32 published applications in this corpus.
Search patents in H04M- Granted patents
- 182
- Published applications
- 32
- Assignees
- 87
- Inventors
- 329
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 10 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 5 |
| 2003 | 3 | 4 |
| 2004 | 4 | 2 |
| 2005 | 3 | 3 |
| 2006 | 3 | 2 |
| 2007 | 2 | 0 |
| 2008 | 1 | 1 |
| 2009 | 2 | 1 |
| 2010 | 1 | 0 |
| 2011 | 3 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 2 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automatic circuit configuration detection in legacy telephone networks10 Mar 2026US 12,574,286 B2AT&T Intellectual Property I, L. P.
- Medical appliance with electrode multiplexing and related methods16 Jan 2024US 11,872,108 B2Coloplast A/S
- System and method for commissioning a network element11 Apr 2023US 11,627,043 B2Level 3 Communications, LLC
- Method and system to seamlessly upgrade audio services22 Nov 2022US 11,509,766 B2Motorola Solutions, Inc.
- System and method for commissioning a network element21 Sep 2021US 11,128,533 B2Level 3 Communications, LLC
- Ostomy appliance with electrode multiplexing and related methods8 Jan 2026US 2026/0007538 A9Coloplast A/S
- Automatic circuit configuration detection in legacy telephone networks26 Sep 2024US 2024/0323084 A1AT&T Intellectual Property I, L. P.
- Ostomy appliance with electrode multiplexing and related methods11 Apr 2024US 2024/0115411 A1Coloplast A/S
- System and method for commissioning a network element3 Aug 2023US 2023/0246913 A1Level 3 Communications, LLC
- Method and system to seamlessly upgrade audio services26 May 2022US 2022/0166874 A1Motorola Solutions, Inc.
Most cited
By later US patents
- Alarm and test system for a digital added main line169US 5,111,497 ARaychem Corporation · 1992
- System and method for electronically identifying connections of a cross-connect system169US 6,421,322 B1ADC Telecommunications, Inc. · 2002
- Method and apparatus for determining the origin of a remote alarm indication signal162US 5,790,531 AApplied Digital Access, Inc. · 1998
- Facilities data link handler in a performance monitoring and test system76US 5,703,871 AApplied Digital Access, Inc. · 1997
- Means and method of dial up bridging of network for high bandwidth digital communication70US 5,491,695 ADigital Access Corporation · 1996