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2201768
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Patent number 2,201,768
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Issue date May 21, 1940
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2157134
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Patent number 2,157,134
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Issue date May 9, 1939
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2106247
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Patent number 2,106,247
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Issue date Jan 25, 1938
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2048466
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Patent number 2,048,466
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Issue date Jul 21, 1936
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2043836
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Patent number 2,043,836
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Issue date Jun 9, 1936
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1939979
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Patent number 1,939,979
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Issue date Dec 19, 1933
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...