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3254211
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Patent number 3,254,211
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Issue date May 31, 1966
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G01 - MEASURING TESTING
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2487968
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Issue date Nov 15, 1949
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G01 - MEASURING TESTING
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Issue date Jun 21, 1921
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1356873
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Patent number 1,356,873
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Issue date Oct 26, 1920
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS