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Filter media and elements
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Patent number 11,253,802
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Issue date Feb 22, 2022
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Donaldson Company, Inc.
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Qiong Gao
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter media and elements
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Patent number 10,357,730
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Issue date Jul 23, 2019
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Donaldson Company, Inc.
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Qiong Gao
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter media and elements
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Patent number 9,474,994
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Issue date Oct 25, 2016
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Donaldson Company, Inc.
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Qiong Gao
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Method of making a filter device
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Patent number 6,168,681
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Issue date Jan 2, 2001
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Donaldson & Company, Inc.
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Cynthia D. Bellefeuille
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter device
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Patent number 5,869,009
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Issue date Feb 9, 1999
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Donaldson Company, Inc.
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Cynthia D. Bellefeuille
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL