H04M 1/58

Anti-side-tone circuits

H04M1/58 (Anti-side-tone circuits) appears on 125 US grants and 52 published applications in this corpus.

Search patents in H04M
Granted patents
125
Published applications
52
Assignees
100
Inventors
242
Latest grant
12 May 2026

Filings by year

H04M 1/58: granted patents and published applications per publication year
YearGranted patentsPublished applications
197630
197720
197820
197920
198030
198120
198220
198340
198420
198530
198600
198710
198850
198920
199000
199120
199210
199330
199440
199540
199650
199750
199850
199950
200050
200120
200213
200313
200455
200522
200691
200711
200801
200903
201014
201132
201221
201340
201411
201524
201622
201734
201844
201933
202030
202102
202212
202322
202400
202502
202610

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

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