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3796875
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Patent number 3,796,875
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Issue date Mar 12, 1974
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G01 - MEASURING TESTING
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3767919
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Patent number 3,767,919
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Issue date Oct 23, 1973
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G01 - MEASURING TESTING
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3736429
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Patent number 3,736,429
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Issue date May 29, 1973
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G01 - MEASURING TESTING
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3404275
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Patent number 3,404,275
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Issue date Oct 1, 1968
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G01 - MEASURING TESTING
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3222521
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Patent number 3,222,521
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Issue date Dec 7, 1965
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G01 - MEASURING TESTING
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3201586
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Patent number 3,201,586
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Issue date Aug 17, 1965
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G01 - MEASURING TESTING