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TV channel number indicator
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Patent number 3,933,121
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Issue date Jan 20, 1976
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Alps Electric Co., Ltd.
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Akira Otsuki
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H03 - BASIC ELECTRONIC CIRCUITRY
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3189000
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Patent number 3,189,000
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Issue date Jun 15, 1965
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3183509
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Patent number 3,183,509
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Issue date May 11, 1965
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G08 - SIGNALLING
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3165090
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Patent number 3,165,090
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Issue date Jan 12, 1965
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G08 - SIGNALLING
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3164127
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Patent number 3,164,127
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Issue date Jan 5, 1965
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3157152
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Patent number 3,157,152
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Issue date Nov 17, 1964
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3144851
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Patent number 3,144,851
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Issue date Aug 18, 1964
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G08 - SIGNALLING
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3133269
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Patent number 3,133,269
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Issue date May 12, 1964
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3118423
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Patent number 3,118,423
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Issue date Jan 21, 1964
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3106124
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Patent number 3,106,124
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Issue date Oct 8, 1963
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3084144
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Patent number 3,084,144
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Issue date Apr 2, 1963
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3077856
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Patent number 3,077,856
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Issue date Feb 19, 1963
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H03 - BASIC ELECTRONIC CIRCUITRY
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3054380
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Patent number 3,054,380
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Issue date Sep 18, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3048144
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Patent number 3,048,144
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Issue date Aug 7, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3046933
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Patent number 3,046,933
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Issue date Jul 31, 1962
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G05 - CONTROLLING REGULATING
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3028830
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Patent number 3,028,830
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Issue date Apr 10, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3028831
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Patent number 3,028,831
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Issue date Apr 10, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3028832
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Patent number 3,028,832
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Issue date Apr 10, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3028582
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Patent number 3,028,582
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Issue date Apr 3, 1962
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G08 - SIGNALLING
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3022493
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Patent number 3,022,493
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Issue date Feb 20, 1962
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3017849
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Patent number 3,017,849
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Issue date Jan 23, 1962
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3009438
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Patent number 3,009,438
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Issue date Nov 21, 1961
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2992412
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Patent number 2,992,412
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Issue date Jul 11, 1961
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H03 - BASIC ELECTRONIC CIRCUITRY
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2979022
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Patent number 2,979,022
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Issue date Apr 11, 1961
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2923918
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Patent number 2,923,918
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Issue date Feb 2, 1960
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G08 - SIGNALLING
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2920604
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Patent number 2,920,604
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Issue date Jan 12, 1960
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2902604
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Patent number 2,902,604
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Issue date Sep 1, 1959
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G02 - OPTICS
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2870521
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Patent number 2,870,521
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Issue date Jan 27, 1959
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H03 - BASIC ELECTRONIC CIRCUITRY