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3659143
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Patent number 3,659,143
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Issue date Apr 25, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3573629
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Patent number 3,573,629
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3568004
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Patent number 3,568,004
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H03 - BASIC ELECTRONIC CIRCUITRY
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3421087
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Patent number 3,421,087
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3373364
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Patent number 3,373,364
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H03 - BASIC ELECTRONIC CIRCUITRY
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3339105
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Patent number 3,339,105
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3225302
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Patent number 3,225,302
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H03 - BASIC ELECTRONIC CIRCUITRY
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2840760
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Patent number 2,840,760
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Issue date Jun 24, 1958
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H03 - BASIC ELECTRONIC CIRCUITRY
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2840693
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Patent number 2,840,693
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H03 - BASIC ELECTRONIC CIRCUITRY
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2756382
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H03 - BASIC ELECTRONIC CIRCUITRY
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2656487
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H03 - BASIC ELECTRONIC CIRCUITRY
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2635213
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H03 - BASIC ELECTRONIC CIRCUITRY
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2590783
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H03 - BASIC ELECTRONIC CIRCUITRY
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2569362
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H03 - BASIC ELECTRONIC CIRCUITRY
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2490847
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H03 - BASIC ELECTRONIC CIRCUITRY
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2467116
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Patent number 2,467,116
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2467329
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2457112
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H03 - BASIC ELECTRONIC CIRCUITRY
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2282108
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H03 - BASIC ELECTRONIC CIRCUITRY
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2227603
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2187603
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2178764
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Issue date Nov 7, 1939
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2175827
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H03 - BASIC ELECTRONIC CIRCUITRY
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2130901
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H03 - BASIC ELECTRONIC CIRCUITRY
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2120787
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H03 - BASIC ELECTRONIC CIRCUITRY
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2104844
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H03 - BASIC ELECTRONIC CIRCUITRY
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2104861
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Patent number 2,104,861
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H03 - BASIC ELECTRONIC CIRCUITRY
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2073701
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Patent number 2,073,701
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H03 - BASIC ELECTRONIC CIRCUITRY
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2065369
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Patent number 2,065,369
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H03 - BASIC ELECTRONIC CIRCUITRY