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3706044
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Patent number 3,706,044
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Issue date Dec 12, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3622902
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Patent number 3,622,902
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Issue date Nov 23, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3619797
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Patent number 3,619,797
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Issue date Nov 9, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3443235
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Patent number 3,443,235
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Issue date May 6, 1969
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G11 - INFORMATION STORAGE
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3434069
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Patent number 3,434,069
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Issue date Mar 18, 1969
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G01 - MEASURING TESTING
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3292098
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Patent number 3,292,098
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Issue date Dec 13, 1966
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G06 - COMPUTING CALCULATING COUNTING