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Fine fiber media layer
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Patent number 10,967,315
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Issue date Apr 6, 2021
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Donaldson Company, Inc.
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Hoo Young Chung
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Fine fiber media layer
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Patent number 10,272,374
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Issue date Apr 30, 2019
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Donaldson Company, Inc.
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Hoo Young Chung
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Fine fiber media layer
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Patent number 9,718,012
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Issue date Aug 1, 2017
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Donaldson Company, Inc.
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Hoo Young Chung
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Fine fiber media layer
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Patent number 8,709,118
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Issue date Apr 29, 2014
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Fine fiber media layer
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Patent number 8,512,431
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Issue date Aug 20, 2013
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Fine fiber media layer
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Patent number 8,366,797
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Issue date Feb 5, 2013
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Fine fiber media layer
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Patent number 8,118,901
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Issue date Feb 21, 2012
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Fine fiber media layer
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Patent number 8,029,588
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Issue date Oct 4, 2011
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Process if making fine fiber material
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Patent number 6,955,775
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Issue date Oct 18, 2005
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Donaldson Company, Inc.
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Hoo Y. Chung
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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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