H04N 21/478

Supplemental services

Official title: Supplemental services, e.g. displaying phone caller identification, shopping application

H04N21/478 (Supplemental services) appears on 11,053 US grants and 15,175 published applications in this corpus.

Search patents in H04N
Granted patents
11,053
Published applications
15,175
Assignees
2,778
Inventors
20,313
Latest grant
6 Oct 2026

Filings by year

H04N 21/478: granted patents and published applications per publication year
YearGranted patentsPublished applications
198620
198700
198810
198920
199050
199170
199250
199370
1994100
199580
1996290
1997390
1998590
1999870
20001050
2001132116
2002101556
200390449
2004130456
200593471
2006197517
2007189522
2008207637
2009215624
2010305644
2011356629
2012459688
2013563781
2014766976
2015773858
2016713760
2017701653
2018577552
2019672537
2020574523
2021554597
2022521590
2023529669
2024550599
2025487495
2026233276

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

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