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Air cleaner
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Patent number 6,451,080
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Issue date Sep 17, 2002
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Donaldson Company, Inc.
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Gary J. Rocklitz
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Air cleaner cover
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Patent number D462117
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Issue date Aug 27, 2002
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Donaldson Company, Inc.
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Steven Scott Gieseke
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D23 - Environmental heating and cooling
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Air cleaner
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Patent number D450376
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Issue date Nov 13, 2001
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Donaldson Company, Inc.
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Steven S. Gieseke
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D23 - Environmental heating and cooling
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Panel filter
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Patent number D439963
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Issue date Apr 3, 2001
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Donaldson Company, Inc.
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Steven Scott Gieseke
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D23 - Environmental heating and cooling