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3746982
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Patent number 3,746,982
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Issue date Jul 17, 1973
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G01 - MEASURING TESTING
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3714813
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Patent number 3,714,813
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Issue date Feb 6, 1973
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G06 - COMPUTING CALCULATING COUNTING
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3711779
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Patent number 3,711,779
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Issue date Jan 16, 1973
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G01 - MEASURING TESTING
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3596190
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Patent number 3,596,190
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Issue date Jul 27, 1971
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G01 - MEASURING TESTING
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3486091
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Patent number 3,486,091
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Issue date Dec 23, 1969
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G05 - CONTROLLING REGULATING