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3659468
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Issue date May 2, 1972
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G01 - MEASURING TESTING
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G01 - MEASURING TESTING
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3391355
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G01 - MEASURING TESTING
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2996692
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G01 - MEASURING TESTING
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G01 - MEASURING TESTING
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G01 - MEASURING TESTING
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2571055
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Patent number 2,571,055
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G01 - MEASURING TESTING
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2534437
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Patent number 2,534,437
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G01 - MEASURING TESTING
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2516169
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Patent number 2,516,169
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G01 - MEASURING TESTING
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2496837
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G01 - MEASURING TESTING
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G01 - MEASURING TESTING
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2404797
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G01 - MEASURING TESTING