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1759453
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Patent number 1,759,453
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Issue date May 20, 1930
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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764259
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Patent number 764,259
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Issue date Jul 5, 1904
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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189485
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Patent number 189,485
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Issue date Apr 10, 1877
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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93936
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Patent number 93,936
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Issue date Aug 17, 1869
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...