H04N 1/403

Discrimination between the two tones in the picture signal of a two-tone

Official title: Discrimination between the two tones in the picture signal of a two-tone original

H04N1/403 (Discrimination between the two tones in the picture signal of a two-tone) appears on 306 US grants and 86 published applications in this corpus.

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Granted patents
306
Published applications
86
Assignees
111
Inventors
468
Latest grant
12 May 2026

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H04N 1/403: granted patents and published applications per publication year
YearGranted patentsPublished applications
197650
197730
197820
197920
198050
198160
198240
198380
198490
198570
1986110
1987140
198850
1989140
1990130
199180
1992110
1993110
1994120
1995110
199630
1997100
199890
1999100
200080
200154
200233
200315
200432
200565
2006510
200747
200832
200988
201058
201172
201252
201386
201443
201515
201671
201754
201823
201941
202052
202111
202232
202360
202420
202500
202620

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