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High temperature damper
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Patent number 4,308,805
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Issue date Jan 5, 1982
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Nichols Engineering & Research Corp.
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Stuart S. Spater
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F27 - FURNACES KILNS OVENS RETORTS
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Method for treating waste material
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Patent number 4,118,220
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Issue date Oct 3, 1978
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Nichols Engineering & Research Corp.
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Charles F. von Dreusche
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Oil burner system
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Patent number 4,067,682
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Issue date Jan 10, 1978
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Nichols Engineering & Research Corporation
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Ernest Andres Lado
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Apparatus for reclaiming limestone mud
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Patent number 3,961,903
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Issue date Jun 8, 1976
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Nichols Engineering & Research Corporation
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Haagen Bach Nielsen
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES