H04L 51/00
User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols
Official title: User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
H04L51/00 (User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols) appears on 36,040 US grants and 45,008 published applications in this corpus.
Search patents in H04L- Granted patents
- 36,040
- Published applications
- 45,008
- Assignees
- 7,197
- Inventors
- 60,850
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 17 | 0 |
| 1995 | 21 | 0 |
| 1996 | 29 | 0 |
| 1997 | 35 | 0 |
| 1998 | 88 | 0 |
| 1999 | 103 | 0 |
| 2000 | 145 | 0 |
| 2001 | 151 | 156 |
| 2002 | 200 | 667 |
| 2003 | 196 | 700 |
| 2004 | 257 | 870 |
| 2005 | 216 | 1088 |
| 2006 | 423 | 1184 |
| 2007 | 458 | 1244 |
| 2008 | 470 | 1377 |
| 2009 | 707 | 1383 |
| 2010 | 896 | 1300 |
| 2011 | 1060 | 1296 |
| 2012 | 1287 | 1594 |
| 2013 | 1489 | 1986 |
| 2014 | 1783 | 2544 |
| 2015 | 1888 | 2759 |
| 2016 | 2252 | 3072 |
| 2017 | 2211 | 2811 |
| 2018 | 2217 | 2646 |
| 2019 | 2780 | 2563 |
| 2020 | 2926 | 2433 |
| 2021 | 2638 | 2364 |
| 2022 | 2346 | 2268 |
| 2023 | 2249 | 2150 |
| 2024 | 2059 | 1818 |
| 2025 | 1581 | 1606 |
| 2026 | 828 | 1129 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04L 51/21Monitoring or handling of messages16,842
- H04L 51/04Real-time or near real-time messaging11,848
- H04L 51/07User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols8,221
- H04L 51/52User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols7,276
- H04L 51/02User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols4,052
- H04L 51/58Message adaptation for wireless communication3,800
- H04L 51/06Message adaptation to terminal or network requirements3,696
- H04L 51/42Mailbox-related aspects3,144
All 10 subgroupsShow fewer
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Most cited
By later US patents
- Personal communications internetworking1,899US 5,742,905 ABell Communications Research, Inc. · 1998
- System for supporting collaborative activity1,671US 8,082,301 B2Virtual Agility, Inc. · 2011
- 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
- Electronic mail object synchronization between a desktop computer and mobile device1,364US 6,052,735 AMicrosoft Corporation · 2000