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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3784857
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Patent number 3,784,857
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H03 - BASIC ELECTRONIC CIRCUITRY
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3774068
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Patent number 3,774,068
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H03 - BASIC ELECTRONIC CIRCUITRY
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H03 - BASIC ELECTRONIC CIRCUITRY
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3760222
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H03 - BASIC ELECTRONIC CIRCUITRY
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3758813
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H03 - BASIC ELECTRONIC CIRCUITRY
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3758814
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H03 - BASIC ELECTRONIC CIRCUITRY
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3684920
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Patent number 3,684,920
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H03 - BASIC ELECTRONIC CIRCUITRY
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3671799
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H03 - BASIC ELECTRONIC CIRCUITRY
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3553478
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3544810
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H03 - BASIC ELECTRONIC CIRCUITRY
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3544811
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Patent number 3,544,811
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H03 - BASIC ELECTRONIC CIRCUITRY
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3502935
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3488553
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H03 - BASIC ELECTRONIC CIRCUITRY
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3434004
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H03 - BASIC ELECTRONIC CIRCUITRY
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3428855
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3428854
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3424941
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H03 - BASIC ELECTRONIC CIRCUITRY
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3402320
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H03 - BASIC ELECTRONIC CIRCUITRY
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3388285
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3257578
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H03 - BASIC ELECTRONIC CIRCUITRY
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3221269
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H03 - BASIC ELECTRONIC CIRCUITRY
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2964673
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H03 - BASIC ELECTRONIC CIRCUITRY