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Filter
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Patent number 4,604,201
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Issue date Aug 5, 1986
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Dr. Muller AG
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Hans Muller
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter element
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Patent number 4,473,472
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Issue date Sep 25, 1984
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Dr. Muller AG
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Hans Muller
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter element
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Patent number 4,225,441
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Issue date Sep 30, 1980
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Chemap AG
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Hans Muller
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filtering method and apparatus
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Patent number 4,167,482
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Issue date Sep 11, 1979
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Hans Muller
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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