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Oil skimmer
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Patent number 6,358,409
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Issue date Mar 19, 2002
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Safety-Kleen Systems, Inc.
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William L. Jacoby
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Machine coolant management system
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Patent number 6,322,694
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Issue date Nov 27, 2001
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Safety-Kleen Systems, Inc.
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Nick Iliadis
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Composite liquid filter
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Patent number 5,582,743
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Issue date Dec 10, 1996
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Safety-Kleen Corp.
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Douglas A. Larson
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B08 - CLEANING
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Composite liquid filter
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Patent number 5,478,465
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Issue date Dec 26, 1995
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Safety-Kleen Corp.
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Douglas A. Larson
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B08 - CLEANING