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Airborne contaminant indicator
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Patent number 6,187,596
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Issue date Feb 13, 2001
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Donaldson Company, Inc.
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Andrew J. Dallas
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Airborne contaminant indicator
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Patent number 5,976,467
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Issue date Nov 2, 1999
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Donaldson Company, Inc.
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Andrew J. Dallas
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Adsorption apparatus
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Patent number 5,964,927
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Issue date Oct 12, 1999
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Donaldson Company, Inc.
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Kristine M. Graham
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F24 - HEATING RANGES VENTILATING
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Filter cartridge
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Patent number 5,935,284
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Issue date Aug 10, 1999
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Donaldson Company, Inc.
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Joseph C. Tokar
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Mist collector cartridge
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Patent number 5,415,676
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Issue date May 16, 1995
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Donaldson Company, Inc.
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Joseph C. Tokar
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL