H04L 51/56

Unified messaging

Official title: Unified messaging, e.g. interactions between e-mail, instant messaging or converged IP messaging [CPM]

H04L51/56 (Unified messaging) appears on 2,254 US grants and 2,689 published applications in this corpus.

Search patents in H04L
Granted patents
2,254
Published applications
2,689
Assignees
777
Inventors
4,240
Latest grant
6 Oct 2026

Filings by year

H04L 51/56: granted patents and published applications per publication year
YearGranted patentsPublished applications
199510
199620
199750
199880
199950
200080
20011018
20021949
20032197
20042559
20052069
20063961
20074170
20083380
200938101
20105476
20116889
20127696
201392164
2014125155
2015142150
2016147216
2017131159
2018140105
2019155138
2020146130
2021175145
2022138124
2023135134
2024129101
20258568
20264135

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

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