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3889254
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Patent number 3,889,254
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G01 - MEASURING TESTING
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3872726
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G01 - MEASURING TESTING
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3798637
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H03 - BASIC ELECTRONIC CIRCUITRY
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3786488
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G06 - COMPUTING CALCULATING COUNTING
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3745560
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G01 - MEASURING TESTING
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3742489
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Patent number 3,742,489
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H03 - BASIC ELECTRONIC CIRCUITRY
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3739375
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Patent number 3,739,375
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3737893
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Patent number 3,737,893
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H03 - BASIC ELECTRONIC CIRCUITRY
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3729732
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H03 - BASIC ELECTRONIC CIRCUITRY
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3686487
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Patent number 3,686,487
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G01 - MEASURING TESTING
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3684968
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Patent number 3,684,968
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H03 - BASIC ELECTRONIC CIRCUITRY
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3681577
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Patent number 3,681,577
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G01 - MEASURING TESTING
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3668693
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Patent number 3,668,693
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H03 - BASIC ELECTRONIC CIRCUITRY
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3665457
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Patent number 3,665,457
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H03 - BASIC ELECTRONIC CIRCUITRY
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3648182
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Patent number 3,648,182
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G06 - COMPUTING CALCULATING COUNTING
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3641563
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G11 - INFORMATION STORAGE
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3624639
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H03 - BASIC ELECTRONIC CIRCUITRY
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3613067
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H03 - BASIC ELECTRONIC CIRCUITRY
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3594765
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Patent number 3,594,765
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3587091
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H03 - BASIC ELECTRONIC CIRCUITRY
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3582940
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H03 - BASIC ELECTRONIC CIRCUITRY
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3573803
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H03 - BASIC ELECTRONIC CIRCUITRY
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3573793
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H03 - BASIC ELECTRONIC CIRCUITRY
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3571725
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3569952
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3567949
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G01 - MEASURING TESTING
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3566397
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Patent number 3,566,397
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H03 - BASIC ELECTRONIC CIRCUITRY
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3560957
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Patent number 3,560,957
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G06 - COMPUTING CALCULATING COUNTING