H04M 3/4285

Notifying, informing or entertaining a held party while on hold

Official title: {Notifying, informing or entertaining a held party while on hold, e.g. Music On Hold}

H04M3/4285 (Notifying, informing or entertaining a held party while on hold) appears on 330 US grants and 272 published applications in this corpus.

Search patents in H04M
Granted patents
330
Published applications
272
Assignees
164
Inventors
673
Latest grant
7 Jul 2026

Filings by year

H04M 3/4285: granted patents and published applications per publication year
YearGranted patentsPublished applications
197610
197700
197810
197910
198010
198100
198200
198310
198430
198500
198620
198700
198810
198900
199020
199110
199200
199300
199410
199500
199630
199730
199860
1999130
200060
200196
20021516
20031117
20042015
20051210
20061513
20071525
2008615
2009711
2010911
20111312
20121414
20131711
2014207
20151017
20161313
2017115
201888
201999
2020188
2021911
202296
202377
202422
202533
202620

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

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