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3816825
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H03 - BASIC ELECTRONIC CIRCUITRY
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3789389
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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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3631233
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G06 - COMPUTING CALCULATING COUNTING
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3629739
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Patent number 3,629,739
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H03 - BASIC ELECTRONIC CIRCUITRY
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3594780
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H03 - BASIC ELECTRONIC CIRCUITRY
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3587089
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H03 - BASIC ELECTRONIC CIRCUITRY
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3585631
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H03 - BASIC ELECTRONIC CIRCUITRY
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3579228
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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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H03 - BASIC ELECTRONIC CIRCUITRY
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3577139
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H03 - BASIC ELECTRONIC CIRCUITRY
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3500387
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H03 - BASIC ELECTRONIC CIRCUITRY
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3480946
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3469255
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3462759
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H03 - BASIC ELECTRONIC CIRCUITRY
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3460133
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H03 - BASIC ELECTRONIC CIRCUITRY
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H03 - BASIC ELECTRONIC CIRCUITRY
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3444550
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H03 - BASIC ELECTRONIC CIRCUITRY
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3425051
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H03 - BASIC ELECTRONIC CIRCUITRY
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3343155
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3333187
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H03 - BASIC ELECTRONIC CIRCUITRY
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3329950
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3322942
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H03 - BASIC ELECTRONIC CIRCUITRY
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3320534
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H03 - BASIC ELECTRONIC CIRCUITRY
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3283320
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H03 - BASIC ELECTRONIC CIRCUITRY
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3281832
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3277462
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H03 - BASIC ELECTRONIC CIRCUITRY
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3259896
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H03 - BASIC ELECTRONIC CIRCUITRY