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1752398
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Patent number 1,752,398
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Issue date Apr 1, 1930
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1673203
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Patent number 1,673,203
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Issue date Jun 12, 1928
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1524053
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Patent number 1,524,053
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Issue date Jan 27, 1925
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1465890
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Patent number 1,465,890
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Issue date Aug 21, 1923
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1395505
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Patent number 1,395,505
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Issue date Nov 1, 1921
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...