H04M 3/247
Knowledge-based maintenance systems
Official title: {Knowledge-based maintenance systems}
H04M3/247 (Knowledge-based maintenance systems) appears on 62 US grants and 44 published applications in this corpus.
Search patents in H04M- Granted patents
- 62
- Published applications
- 44
- Assignees
- 42
- Inventors
- 127
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 3 |
| 2004 | 2 | 5 |
| 2005 | 2 | 2 |
| 2006 | 3 | 6 |
| 2007 | 3 | 7 |
| 2008 | 2 | 2 |
| 2009 | 2 | 0 |
| 2010 | 2 | 2 |
| 2011 | 5 | 4 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 3 | 0 |
| 2015 | 2 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 2 | 6 |
| 2022 | 1 | 1 |
| 2023 | 5 | 1 |
| 2024 | 1 | 2 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- DSL fault location2 Sep 2025US 12,407,773 B2British Telecommunications Public Ltd.Co.
- Machine learning dataset generation using a natural language processing technique17 Jun 2025US 12,335,435 B2Capital One Services, LLC
- Systems and techniques for assessing a customer premises equipment device2 Jul 2024US 12,028,235 B2Promptlink Communications, Inc.
- Communication issue detection using evaluation of multiple machine learning models26 Sep 2023US 11,769,520 B2EMC IP Holding Company LLC
- Machine learning dataset generation using a natural language processing technique25 Jul 2023US 11,711,462 B2Capital One Services, LLC
- Systems and techniques for assessing a customer premises equipment device1 May 2025US 2025/0141775 A1Promptlink Communications, Inc.
- Systems and methods for real-time quality analysis of wireless live audio streams2 Jan 2025US 2025/0007805 A1Mixhalo Corp.
- Dsl fault location18 Apr 2024US 2024/0129404 A1British Telecommunications Public Ltd.Co.
- Machine learning dataset generation using a natural language processing technique25 Jan 2024US 2024/0031477 A1Capital One Services, LLC
- Systems and techniques for assessing a customer premises equipment device22 Jun 2023US 2023/0198884 A1Promptlink Communications, Inc.
Most cited
By later US patents
- Event correlation267US 5,748,098 ABritish Telecommunications Public Ltd.Co. · 1998
- Pressure alarms and reports system module for proactive maintenance application234US 6,771,739 B1BellSouth Intellectual Property Corporation · 2004
- Method and apparatus for resolving faults in communications networks225US 5,666,481 ACabletron Systems, Inc. · 1997
- Autonomous expert system for directly maintaining remote telephone switching systems139US 4,972,453 AAT&T Bell Laboratories · 1990
- Expert system for processing errors in a multiplex communications system96US 4,881,230 AIBM Corporation · 1989