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Gas mask filter canister
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Patent number 8,292,991
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Issue date Oct 23, 2012
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Avon Protection Systems, Inc.
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David K. Friday
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A62 - LIFE-SAVING FIRE-FIGHTING
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Residual life indicator
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Patent number 8,205,483
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Issue date Jun 26, 2012
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The United States of America as represented by the Secretary of the Army
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Gregory W. Peterson
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter integrity tester
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Patent number 7,592,178
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Issue date Sep 22, 2009
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Hunter Menufacturing Co.
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Yuqing Ding
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Gas mask filter canister
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Patent number 7,311,764
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Issue date Dec 25, 2007
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Avon Protection Systems, Inc.
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David K. Friday
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A62 - LIFE-SAVING FIRE-FIGHTING
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