H04L 51/21
Monitoring or handling of messages
H04L51/21 (Monitoring or handling of messages) appears on 16,842 US grants and 20,051 published applications in this corpus.
Search patents in H04L- Granted patents
- 16,842
- Published applications
- 20,051
- Assignees
- 3,712
- Inventors
- 30,022
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 14 | 0 |
| 1997 | 17 | 0 |
| 1998 | 45 | 0 |
| 1999 | 58 | 0 |
| 2000 | 79 | 0 |
| 2001 | 84 | 69 |
| 2002 | 115 | 319 |
| 2003 | 101 | 324 |
| 2004 | 126 | 395 |
| 2005 | 105 | 524 |
| 2006 | 197 | 572 |
| 2007 | 223 | 538 |
| 2008 | 231 | 621 |
| 2009 | 367 | 662 |
| 2010 | 439 | 554 |
| 2011 | 534 | 601 |
| 2012 | 613 | 687 |
| 2013 | 675 | 783 |
| 2014 | 791 | 996 |
| 2015 | 778 | 1121 |
| 2016 | 1022 | 1393 |
| 2017 | 1009 | 1271 |
| 2018 | 999 | 1242 |
| 2019 | 1276 | 1184 |
| 2020 | 1373 | 1141 |
| 2021 | 1305 | 1073 |
| 2022 | 1126 | 1046 |
| 2023 | 1095 | 980 |
| 2024 | 959 | 834 |
| 2025 | 709 | 700 |
| 2026 | 346 | 421 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04L 51/212Using filtering or selective blocking5,049
- H04L 51/214Using selective forwarding3,626
- H04L 51/216Handling conversation history3,536
- H04L 51/224Providing notification on incoming messages3,024
- H04L 51/222Using geographical location information2,251
- H04L 51/234For tracking messages1,551
- H04L 51/226Delivery according to priorities1,295
- H04L 51/23Reliability checks1,270
Recent patents
- Systems and methods for AI based normalization and indexing of multi-protocol message content using universal message objects6 Oct 2026US 12,754,918 B2Entefy Inc.
- System for generating automated responses for issue tracking system and multi-platform event feeds6 Oct 2026US 12,756,678 B2Atlassian Pty Ltd.
- Engaging unknowns in response to interactions with knowns6 Oct 2026US 12,756,680 B2Truist Bank
- Detecting and preventing transmission of spam messages using modified source numbers6 Oct 2026US 12,756,689 B2Proofpoint, Inc.
- Dynamically controlling access to linked content in electronic communications29 Sep 2026US 12,748,869 B2Proofpoint, Inc.
- Iterative communication plan generation using large language models8 Oct 2026US 2026/0310890 A1Capital One Services, LLC
- Topic-Based Synchronization Of A Chat Interface With An Information Interface8 Oct 2026US 2026/0312925 A1Oracle International Corporation
- Information processing system, information processing method, and program8 Oct 2026US 2026/0312926 A1Communitio Corporation
- Risk-based event prediction and alert with visualized process flow8 Oct 2026US 2026/0312927 A1International Business Machines Corporation
- Systems and methods for evaluating and displaying subject-specific compliance standard information8 Oct 2026US 2026/0312928 A1Ac Infotech Inc.
Most cited
By later US patents
- Personal communications internetworking1,899US 5,742,905 ABell Communications Research, Inc. · 1998
- Selective delivery of electronic messages in a multiple computer system based on context and environment of a user1,572US 5,493,692 AXerox Corporation · 1996
- Centrifugal communication and collaboration method1,511US 6,161,149 AGroupServe, Inc. · 2000
- Internet messaging system and method for use in computer networks1,246US 6,484,196 B1Advanced Web Solutions · 2002
- System for on-line service in which gateway computer uses service map which includes loading condition of servers broadcasted by application servers for load balancing1,192US 5,774,668 AMicrosoft Corporation · 1998