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Aeration apparatus for pond
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Patent number 5,011,372
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Issue date Apr 30, 1991
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Nigrelli Systems, Inc.
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Nicholas B. Nigrelli
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Aeration apparatus and method
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Patent number 4,981,622
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Issue date Jan 1, 1991
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Nigrelli Systems, Inc.
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Nicholas B. Nigrelli
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Contoured package cover dispenser
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Patent number 4,805,372
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Issue date Feb 21, 1989
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Nigrelli Systems, Inc.
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Nicholas B. Nigrelli
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Case loader
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Patent number 4,531,345
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Issue date Jul 30, 1985
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Nicholas B. Nigrelli
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL