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3243271
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Patent number 3,243,271
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Issue date Mar 29, 1966
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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3238027
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Patent number 3,238,027
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Issue date Mar 1, 1966
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A62 - LIFE-SAVING FIRE-FIGHTING
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3090685
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Patent number 3,090,685
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Issue date May 21, 1963
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2277879
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Patent number 2,277,879
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Issue date Mar 31, 1942
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2216280
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Patent number 2,216,280
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Issue date Oct 1, 1940
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2183709
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Patent number 2,183,709
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Issue date Dec 19, 1939
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2161700
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Patent number 2,161,700
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Issue date Jun 6, 1939
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2087170
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Patent number 2,087,170
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Issue date Jul 13, 1937
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1955679
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Patent number 1,955,679
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Issue date Apr 17, 1934
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1835136
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Patent number 1,835,136
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Issue date Dec 8, 1931
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1753529
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Patent number 1,753,529
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Issue date Apr 8, 1930
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1490830
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Patent number 1,490,830
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Issue date Apr 15, 1924
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1430247
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Patent number 1,430,247
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Issue date Sep 26, 1922
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...