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2498507
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Patent number 2,498,507
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Issue date Feb 21, 1950
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2475534
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Patent number 2,475,534
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Issue date Jul 5, 1949
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2468146
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Patent number 2,468,146
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Issue date Apr 26, 1949
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2172709
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Patent number 2,172,709
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Issue date Sep 12, 1939
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES