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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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Self-spaced pleated filter
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Patent number 5,066,400
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Issue date Nov 19, 1991
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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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Seal arrangement for fluid filters
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Patent number 4,834,885
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Issue date May 30, 1989
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Donaldson Company, Inc.
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Kenneth G. Misgen
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Apparatus for coupling tubular members
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Patent number 4,790,574
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Issue date Dec 13, 1988
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Donaldson Company, Inc.
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Wayne M. Wagner
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES