H04M 1/57

Arrangements for indicating or recording the number of the calling subscriber at

Official title: Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set (at the operator set in a manual exchange H04M5/20)

H04M1/57 (Arrangements for indicating or recording the number of the calling subscriber at) appears on 3,091 US grants and 2,750 published applications in this corpus.

Search patents in H04M
Granted patents
3,091
Published applications
2,750
Assignees
802
Inventors
5,028
Latest grant
18 Aug 2026

Filings by year

H04M 1/57: granted patents and published applications per publication year
YearGranted patentsPublished applications
197620
197710
197820
197910
198030
198140
198200
198300
198440
198510
198620
198720
198870
198960
199080
1991100
199270
1993150
1994290
1995320
1996530
1997530
1998840
19991190
20001050
200112756
2002111144
2003100163
2004109164
200586156
2006120212
2007131229
200875176
200984168
201099138
2011143141
2012196120
2013183133
2014178119
2015119102
2016131112
201710587
20189655
20196343
20208265
20215547
20225239
20233225
20242832
20252816
202688

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

Subgroups

Granted patents

Recent patents

Most cited

By later US patents