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2200141
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Issue date May 7, 1940
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G01 - MEASURING TESTING
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2162622
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Patent number 2,162,622
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G01 - MEASURING TESTING
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Patent number 1,759,885
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G01 - MEASURING TESTING
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Patent number 1,436,769
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Issue date Nov 28, 1922
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G01 - MEASURING TESTING