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Pond water destratifier
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Patent number 5,176,503
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Issue date Jan 5, 1993
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Jerry D. Palmer
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Pond water destratifier
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Patent number 5,104,589
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Issue date Apr 14, 1992
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Jerry D. Palmer
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3139271
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Patent number 3,139,271
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Issue date Jun 30, 1964
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1724515
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Patent number 1,724,515
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Issue date Aug 13, 1929
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL