H04M 1/663

Preventing unauthorised calls to a telephone set

H04M1/663 (Preventing unauthorised calls to a telephone set) appears on 1,259 US grants and 1,123 published applications in this corpus.

Search patents in H04M
Granted patents
1,259
Published applications
1,123
Assignees
469
Inventors
2,343
Latest grant
11 Aug 2026

Filings by year

H04M 1/663: granted patents and published applications per publication year
YearGranted patentsPublished applications
197610
197700
197810
197900
198000
198110
198200
198370
198480
198530
198660
198740
198830
1989120
199070
199190
199280
1993140
1994110
1995190
1996250
1997310
1998370
1999480
2000480
20013729
20024474
20033453
20044668
20053470
20064070
20074689
20082869
20092855
20104366
20114343
20125536
20137054
20146853
20153839
20164644
20173831
20184129
20193824
20203122
20212727
20222127
20232119
20241416
20251211
2026135

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

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