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Center core cartridge feeder insert
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Patent number 5,897,770
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Issue date Apr 27, 1999
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Plymouth Products, Inc.
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Gary L. Hatch
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Water purifying filter device
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Patent number 5,061,367
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Issue date Oct 29, 1991
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Ametek, Inc.
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Gary L. Hatch
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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