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Ceramic diffuser assembly
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Patent number 5,863,031
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Issue date Jan 26, 1999
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Ferro Corporation
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Richard K. Veeder
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Gas diffuser dome
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Patent number 5,075,048
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Issue date Dec 24, 1991
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Ferro Corporation
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Richard K. Veeder
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Air diffuser element
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Patent number 4,046,845
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Issue date Sep 6, 1977
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Ferro Corporation
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Richard K. Veeder
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE