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3750142
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Patent number 3,750,142
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Issue date Jul 31, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3731279
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Patent number 3,731,279
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Issue date May 1, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3725903
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Patent number 3,725,903
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Issue date Apr 3, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3719808
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Patent number 3,719,808
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Issue date Mar 6, 1973
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G05 - CONTROLLING REGULATING
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3683369
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Patent number 3,683,369
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Issue date Aug 8, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3671961
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Patent number 3,671,961
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Issue date Jun 20, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3654560
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Patent number 3,654,560
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Issue date Apr 4, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3634851
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Patent number 3,634,851
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Issue date Jan 11, 1972
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G01 - MEASURING TESTING
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3582777
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Patent number 3,582,777
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Issue date Jun 1, 1971
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G01 - MEASURING TESTING
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3568181
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Patent number 3,568,181
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Issue date Mar 2, 1971
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G01 - MEASURING TESTING
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3541320
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Patent number 3,541,320
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Issue date Nov 17, 1970
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G06 - COMPUTING CALCULATING COUNTING