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3842413
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Patent number 3,842,413
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Issue date Oct 15, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3816825
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Patent number 3,816,825
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Issue date Jun 11, 1974
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H03 - BASIC ELECTRONIC CIRCUITRY
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3745559
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Patent number 3,745,559
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Issue date Jul 10, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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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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3729732
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Patent number 3,729,732
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H03 - BASIC ELECTRONIC CIRCUITRY
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3701148
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Patent number 3,701,148
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Issue date Oct 24, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3683367
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Patent number 3,683,367
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Issue date Aug 8, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3676600
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Patent number 3,676,600
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Issue date Jul 11, 1972
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3653029
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Patent number 3,653,029
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Issue date Mar 28, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3644924
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Patent number 3,644,924
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Issue date Feb 22, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3641562
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Patent number 3,641,562
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Issue date Feb 8, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3631469
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Patent number 3,631,469
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Issue date Dec 28, 1971
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G01 - MEASURING TESTING
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3629739
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Patent number 3,629,739
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Issue date Dec 21, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3626407
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Patent number 3,626,407
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Issue date Dec 7, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3587089
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Patent number 3,587,089
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Issue date Jun 22, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3581304
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Patent number 3,581,304
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Issue date May 25, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3579228
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Patent number 3,579,228
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H03 - BASIC ELECTRONIC CIRCUITRY
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3579231
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Patent number 3,579,231
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Issue date May 18, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3577139
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Patent number 3,577,139
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Issue date May 4, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3573806
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Patent number 3,573,806
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H03 - BASIC ELECTRONIC CIRCUITRY
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3571757
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Patent number 3,571,757
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H03 - BASIC ELECTRONIC CIRCUITRY
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3550116
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Patent number 3,550,116
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Issue date Dec 22, 1970
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H03 - BASIC ELECTRONIC CIRCUITRY
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3541315
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Patent number 3,541,315
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H03 - BASIC ELECTRONIC CIRCUITRY
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3522599
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Patent number 3,522,599
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Issue date Aug 4, 1970
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3500387
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Patent number 3,500,387
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Issue date Mar 10, 1970
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H03 - BASIC ELECTRONIC CIRCUITRY
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3493960
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Patent number 3,493,960
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Issue date Feb 3, 1970
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H03 - BASIC ELECTRONIC CIRCUITRY
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3480946
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Patent number 3,480,946
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Issue date Nov 25, 1969
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G08 - SIGNALLING
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3470325
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Patent number 3,470,325
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3467958
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Patent number 3,467,958
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H03 - BASIC ELECTRONIC CIRCUITRY
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3460133
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Patent number 3,460,133
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Issue date Aug 5, 1969
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H03 - BASIC ELECTRONIC CIRCUITRY